Frequently Asked Questions (FAQ)
Registration & Payment
Q. How do I register for the event?
A: To participate in IHC2026, registration in advance is required. Please find further details and proceed with the registration and payment from REGISTRATION.
Q. I do not understand the registration system for this congress.
IHC2026 uses three separate systems for registration:
1. Confit: For registration for attendance of the congress.
2. ROSA (ISHS): For abstract submission for oral/poster presentations.
3. Art-Tourist system: For options which are not included in the registration fee (i.e., post-congress tours, Gala Dinner, 1-day technical tours, and Scientific events on Aug. 28). This system is currently under preparation, please check our website for updates.
Q. How can I check/update my registration details?
A. Please log in Confit (the participant registration system), and select “View registration info”.
Q. How do I get my invoice/ receipt?
A. We kindly ask that you download your invoice/receipt as follows:
1. Log in with A-Pass：https://ihc.confit.atlas.jp/login
2. Go to ‘Registration Info’ and click ‘Invoice Download’
Q. How do I register for the event?
A: To participate in IHC2026, registration in advance is required. Please find further details and proceed with the registration and payment from REGISTRATION.
Q. I do not understand the registration system for this congress.
IHC2026 uses three separate systems for registration:
1. Confit: For registration for attendance of the congress.
2. ROSA (ISHS): For abstract submission for oral/poster presentations.
3. Art-Tourist system: For options which are not included in the registration fee (i.e., post-congress tours, Gala Dinner, 1-day technical tours, and Scientific events on Aug. 28). This system is currently under preparation, please check our website for updates.
Q. How can I check/update my registration details?
A. Please log in Confit (the participant registration system), and select “View registration info”.
Q. How do I get my invoice/ receipt?
A. We kindly ask that you download your invoice/receipt as follows:
1. Log in with A-Pass：https://ihc.confit.atlas.jp/login
2. Go to ‘Registration Info’ and click ‘Invoice Download’
Q. I would like an invoice addressed to my institution or company. How can I request it?
A. Please contact to the management office: reg-ihc2026@convention.co.jp
Q. When does the Early-Bird registration period end?
A. January 15, 2026.
Note that anyone who apply Early-Bird must complete payment before the ending day of the Early-Bird registration period.
If they don’t, their registration will be cancelled, and they will have to reapply the registration with regular fees.
Q. What happens if I don’t pay within the Early bird registration period?
A. The registration will be cancelled, and they will have to reapply the registration with regular fees or on-site fees.
However, the presenting author will be required to complete the registration and payment for the registration fee to be listed on the presentation program.
Visit the Abstract Submission Guidelines for details.
Q. What does the registration fee include?
A. Inclusion differs with the categories. Visit REGISTRATION and refer to "Registration fee includes" for details.
Q. Are there any discounts for students?
A. Yes. We offer a student registration category.
Visit REGISTRATION and refer to “Category and Registration Fee” for details.
Those who apply for “Student” are requested to upload the student ID card indicating his/her student status in the registration process.
Q. Are there any other documents accepted as the proof of student status?
A. Yes. An official certificate proving your current enrollment issued by your university is acceptable.
Q. I registered for the event, but my schedule has changed. Can I get a refund?
A. We’re sorry, but no refunds will be issued for any reason after the payment has been completed. Additionally, once payment is made, you cannot change your registration category or cancel any accompanying persons. Please make sure to finalize all details before proceeding with payment.
However, if your abstract was rejected, please contact to the management office and we will arrange a refund upon request.
Q. I received an error code ER000 or ER997 during payment. What do these codes mean?
A. These errors usually occur due to one of the following reasons:
- The registration or payment page was left open for more than 20 minutes without any activity.
- The Back button was used during the payment process.
To resolve this issue, please return to the registration page and start the process again from the beginning.
Q. I received an error code ER900 during payment.
A. This Error code is that you encountered a 3D Secure authentication error while attempting to complete your credit card payment. This type of error typically occurs when the authentication process required by your card issuer is not successfully completed.
To help resolve this issue, we kindly suggest the following steps:
1. Ensure your card is enrolled in 3D Secure (e.g., Verified by Visa, Mastercard Secure Code).
2. Check with your card issuer to confirm that your card supports 3D Secure and that there are no restrictions or blocks on online transactions.
3. Try using a different browser or device, as technical issues may sometimes interfere with the authentication process.
4. Attempt the transaction again, ensuring that all required authentication steps are completed.
Q: I cannot find the VAT number.
A. Japan does not operate under the VAT number system, so we are unable to provide a VAT number.
Q. How can I register an accompanying person?
A. An accompanying person can be registered from your Confit account (the participant registration system).
Please note that the accompanying person will not be allowed to attend scientific sessions or give oral/poster presentations.
Visit REGISTRATION for more information.
Q. How can I apply for an invitation letter?
A. Please complete the form from “Apply for Invitation Letter”.
Please note that advance registration is required before applying for this letter.
This is an invitation letter providing information that IHC 2026 will be held and is not a visa support letter guaranteeing visa issuance.
(For visa related information, please refer to the “Visa” section below)
Q. What is the invitation letter for the IHC2026?
A. The invitation letter is issued providing the information that IHC2026 will be held.
Please note that this invitation letter is not a visa support letter and does not guarantee visa issuance.
(For visa related information, please refer to the “Visa” section below)
Q. Is the invitation letter for visa application purposes?
A. No. The invitation letter application mentioned under “REGISTRATION” on the website is not intended for visa application purposes. It is intended solely to confirm that the IHC 2026 will be held.
(For visa related information, please refer to the “Visa” section below)
Q. Can I register and pay for the congress after my abstract has been accepted?
A. The payment for the registration is required before the program is finalized.
The presenting author is requested to complete the registration and payment to be listed on the presentation program.
However, if the abstract is rejected, the registration fee will be refunded upon a request.
Please refer to the "Important Notes" and "Abstract Submission Guidelines" on the official website https://www.ihc2026.org/symposia/.
A. Please contact to the management office: reg-ihc2026@convention.co.jp
Q. When does the Early-Bird registration period end?
A. January 15, 2026.
Note that anyone who apply Early-Bird must complete payment before the ending day of the Early-Bird registration period.
If they don’t, their registration will be cancelled, and they will have to reapply the registration with regular fees.
Q. What happens if I don’t pay within the Early bird registration period?
A. The registration will be cancelled, and they will have to reapply the registration with regular fees or on-site fees.
However, the presenting author will be required to complete the registration and payment for the registration fee to be listed on the presentation program.
Visit the Abstract Submission Guidelines for details.
Q. What does the registration fee include?
A. Inclusion differs with the categories. Visit REGISTRATION and refer to "Registration fee includes" for details.
Q. Are there any discounts for students?
A. Yes. We offer a student registration category.
Visit REGISTRATION and refer to “Category and Registration Fee” for details.
Those who apply for “Student” are requested to upload the student ID card indicating his/her student status in the registration process.
Q. Are there any other documents accepted as the proof of student status?
A. Yes. An official certificate proving your current enrollment issued by your university is acceptable.
Q. I registered for the event, but my schedule has changed. Can I get a refund?
A. We’re sorry, but no refunds will be issued for any reason after the payment has been completed. Additionally, once payment is made, you cannot change your registration category or cancel any accompanying persons. Please make sure to finalize all details before proceeding with payment.
However, if your abstract was rejected, please contact to the management office and we will arrange a refund upon request.
Q. I received an error code ER000 or ER997 during payment. What do these codes mean?
A. These errors usually occur due to one of the following reasons:
- The registration or payment page was left open for more than 20 minutes without any activity.
- The Back button was used during the payment process.
To resolve this issue, please return to the registration page and start the process again from the beginning.
Q. I received an error code ER900 during payment.
A. This Error code is that you encountered a 3D Secure authentication error while attempting to complete your credit card payment. This type of error typically occurs when the authentication process required by your card issuer is not successfully completed.
To help resolve this issue, we kindly suggest the following steps:
1. Ensure your card is enrolled in 3D Secure (e.g., Verified by Visa, Mastercard Secure Code).
2. Check with your card issuer to confirm that your card supports 3D Secure and that there are no restrictions or blocks on online transactions.
3. Try using a different browser or device, as technical issues may sometimes interfere with the authentication process.
4. Attempt the transaction again, ensuring that all required authentication steps are completed.
Q: I cannot find the VAT number.
A. Japan does not operate under the VAT number system, so we are unable to provide a VAT number.
Q. How can I register an accompanying person?
A. An accompanying person can be registered from your Confit account (the participant registration system).
Please note that the accompanying person will not be allowed to attend scientific sessions or give oral/poster presentations.
Visit REGISTRATION for more information.
Q. How can I apply for an invitation letter?
A. Please complete the form from “Apply for Invitation Letter”.
Please note that advance registration is required before applying for this letter.
This is an invitation letter providing information that IHC 2026 will be held and is not a visa support letter guaranteeing visa issuance.
(For visa related information, please refer to the “Visa” section below)
Q. What is the invitation letter for the IHC2026?
A. The invitation letter is issued providing the information that IHC2026 will be held.
Please note that this invitation letter is not a visa support letter and does not guarantee visa issuance.
(For visa related information, please refer to the “Visa” section below)
Q. Is the invitation letter for visa application purposes?
A. No. The invitation letter application mentioned under “REGISTRATION” on the website is not intended for visa application purposes. It is intended solely to confirm that the IHC 2026 will be held.
(For visa related information, please refer to the “Visa” section below)
Q. Can I register and pay for the congress after my abstract has been accepted?
A. The payment for the registration is required before the program is finalized.
The presenting author is requested to complete the registration and payment to be listed on the presentation program.
However, if the abstract is rejected, the registration fee will be refunded upon a request.
Please refer to the "Important Notes" and "Abstract Submission Guidelines" on the official website https://www.ihc2026.org/symposia/.
Financial Support
Q. Are there any scholarships or financial support available for people from developing countries?
A. We have prepared a special registration fee for developing countries, and you can find your country's category at the URL below.
https://datatopics.worldbank.org/world-development-indicators/the-world-by-income-and-region.html
The countries that qualify for the discounted registration are those classified by The World Bank in the “low-income” or “lower-middle-income” categories based on the current 2025 fiscal year definition.
Q. Are there any scholarships available for international students?
A. Unfortunately, we are unable to offer any scholarships or financial support for students.
Q. Are there any scholarships or financial support available for people from developing countries?
A. We have prepared a special registration fee for developing countries, and you can find your country's category at the URL below.
https://datatopics.worldbank.org/world-development-indicators/the-world-by-income-and-region.html
The countries that qualify for the discounted registration are those classified by The World Bank in the “low-income” or “lower-middle-income” categories based on the current 2025 fiscal year definition.
Q. Are there any scholarships available for international students?
A. Unfortunately, we are unable to offer any scholarships or financial support for students.
Abstract Submission
Q. How do I submit my abstract?
A. All abstracts and manuscripts must be submitted through ROSA (Responsive Online System for Acta Horticulturae submission and review).
To submit an abstract, please visit symposia and select the symposium to which you wish to submit. A link to ROSA will be found at "Submit your abstract" at the bottom of the page.
Q. How many abstracts can I submit?
A. Each participant is allowed to submit up to one abstract for an oral presentation and one for a poster presentation.
Visit Symposia and refer to "Important Notes" for details.
Q. To submit my abstract, do I need to pay either the submission charge or the ISHS membership fee?
A. Yes. An abstract submission charge is due upon submission of an abstract and applies to the presenting author only. For ISHS Individual members, the abstract submission charge is fully waived.
Q. How do I set up an ISHS account?
A. Please visit the following link: ISHS new membership
Q. How can I edit my abstract submission?
A. Please contact the conveners of each symposium to which you have submitted your abstract.
The convener's contact details will be found in ROSA.
Q. Do I need to pay both the abstract submission fee and the conference registration fee (on Confit) for my abstract to be considered?
A. For ISHS Individual members, the abstract submission charge is fully waived. Therefore, only the conference registration fee (on Confit) is required.
If you are not a member of ISHS, and do not plan to become one, you must pay both fees.
Visit Symposia and refer to "important notes" and "Abstract Submission Guidelines" for details.
Q. When will we be notified about the abstract acceptance?
A. The final acceptance and presentation type will be notified to all authors simultaneously by May 2026 for reasons of structuring timetable in the program. However, if funding sources require acceptance/rejection decisions prior to this date, authors may inquire to the conveners. It is noted that the organizing committee cannot guarantee an immediate response.
Q. Can I register and pay for the congress after my abstract has been accepted?
A. The payment for the registration is required before the program is finalized.
The presenting author is requested to complete the registration and payment to be listed on the presentation program.
However, if the abstract is rejected, the registration fee will be refunded upon a request.
Please refer to the "Important Notes" and "Abstract Submission Guidelines" on the official website https://www.ihc2026.org/symposia/.
Q. How do I submit my abstract?
A. All abstracts and manuscripts must be submitted through ROSA (Responsive Online System for Acta Horticulturae submission and review).
To submit an abstract, please visit symposia and select the symposium to which you wish to submit. A link to ROSA will be found at "Submit your abstract" at the bottom of the page.
Q. How many abstracts can I submit?
A. Each participant is allowed to submit up to one abstract for an oral presentation and one for a poster presentation.
Visit Symposia and refer to "Important Notes" for details.
Q. To submit my abstract, do I need to pay either the submission charge or the ISHS membership fee?
A. Yes. An abstract submission charge is due upon submission of an abstract and applies to the presenting author only. For ISHS Individual members, the abstract submission charge is fully waived.
Q. How do I set up an ISHS account?
A. Please visit the following link: ISHS new membership
Q. How can I edit my abstract submission?
A. Please contact the conveners of each symposium to which you have submitted your abstract.
The convener's contact details will be found in ROSA.
Q. Do I need to pay both the abstract submission fee and the conference registration fee (on Confit) for my abstract to be considered?
A. For ISHS Individual members, the abstract submission charge is fully waived. Therefore, only the conference registration fee (on Confit) is required.
If you are not a member of ISHS, and do not plan to become one, you must pay both fees.
Visit Symposia and refer to "important notes" and "Abstract Submission Guidelines" for details.
Q. When will we be notified about the abstract acceptance?
A. The final acceptance and presentation type will be notified to all authors simultaneously by May 2026 for reasons of structuring timetable in the program. However, if funding sources require acceptance/rejection decisions prior to this date, authors may inquire to the conveners. It is noted that the organizing committee cannot guarantee an immediate response.
Q. Can I register and pay for the congress after my abstract has been accepted?
A. The payment for the registration is required before the program is finalized.
The presenting author is requested to complete the registration and payment to be listed on the presentation program.
However, if the abstract is rejected, the registration fee will be refunded upon a request.
Please refer to the "Important Notes" and "Abstract Submission Guidelines" on the official website https://www.ihc2026.org/symposia/.
Symposiums
Q. When will the list of speakers be published?
A. We will announce the program, including the list of speakers, at the end of April 2026.
Q. When will the list of speakers be published?
A. We will announce the program, including the list of speakers, at the end of April 2026.
Accommodation
Q. Do you have any recommendations for hotel accommodations, and is there a special rate for IHC2026 participants?
A. You can find a list of hotels near the ICC Kyoto venue on its official website. We hope this helps you arrange your stay. https://www.icckyoto.or.jp/en/accommodation/hotels-in-kyoto-2/
Please note that no special rates are available for IHC2026.
Q. Do you have any recommendations for hotel accommodations, and is there a special rate for IHC2026 participants?
A. You can find a list of hotels near the ICC Kyoto venue on its official website. We hope this helps you arrange your stay. https://www.icckyoto.or.jp/en/accommodation/hotels-in-kyoto-2/
Please note that no special rates are available for IHC2026.
Visa
Q: When will visa related documents for IHC2026 be available?
A. Visa applications for short-term stays in Japan can be submitted starting three months before your intended date of entry. Since IHC2026 begins on August 23rd, 2026, applications will be accepted from late May 2026. Details and required documents will be available on the official website around May.
Q: When will visa related documents for IHC2026 be available?
A. Visa applications for short-term stays in Japan can be submitted starting three months before your intended date of entry. Since IHC2026 begins on August 23rd, 2026, applications will be accepted from late May 2026. Details and required documents will be available on the official website around May.
Tours
Q. How can I reserve the one-day technical tour and the post-congress tour?
A. The registration and payment system for the Technical Tour and Post-Conference Tour are currently under preparation.
Reservations are expected to begin in late February or early March 2026. Visit TOURS for updates.
Q. Are the tours included in the registration fee?
A. No, the tours are not included. A sepatate fee is required in addition to the registering fee.
Q. How can I reserve the one-day technical tour and the post-congress tour?
A. The registration and payment system for the Technical Tour and Post-Conference Tour are currently under preparation.
Reservations are expected to begin in late February or early March 2026. Visit TOURS for updates.
Q. Are the tours included in the registration fee?
A. No, the tours are not included. A sepatate fee is required in addition to the registering fee.
Gala Dinner
Q. I would like to know more details about the Gala Dinner.
A. We plan to provide detailed information and start taking reservations after March 2026.
Q. Is the Gala Dinner included in the registration fee?
A. No, the Gala Dinner is not included. A sepatate fee is required in addition to the registering fee.
Q. I would like to know more details about the Gala Dinner.
A. We plan to provide detailed information and start taking reservations after March 2026.
Q. Is the Gala Dinner included in the registration fee?
A. No, the Gala Dinner is not included. A sepatate fee is required in addition to the registering fee.
Call for Sponsors
Q. What kinds of sponsorship opportunities are available for IHC 2026?
A. 7 types of sponsorship are available for IHC2026:
1. Package sponsor
2. Exhibition booth
3. Advertisement
4. Sponsored Seminar
5. Coffee Break Sponsorship
6. Gala Dinner Sponsorship
7. Symposium Sponsor
For details about each sponsorship opportunity, please refer to the prospectus links listed under the question “Where can I find the prospectus?” below.
Q. Where can I find the prospectus?
A. Please find the prospectus from the link below:
1. Package sponsor (English page8 / Japanese 8ページ)
2. Exhibition booth (English page9 / Japanese 9ページ)
3. Advertisement (English page11 / Japanese 11ページ)
4. Sponsored Seminar (English page15 / Japanese 14ページ )
5. Coffee Break Sponsorship (English page16 / Japanese 16ページ)
6. Gala Dinner Sponsorship (English page16/ Japanese 16ページ)
7. Symposium Sponsor (English / Japanese)
Q. How can I apply to become a sponsor for IHC 2026?
A. Please apply for sponsorship using the application form below:
Package Sponsor
Exhibition, Advertisement, Sponsored Seminar, Coffee Break Sponsorship, Gala Dinner Sponsorship
Symposium Sponsors
Q. When is the sponsorship application deadline?
A. The application deadlines for each sponsorship are as follows:
April 30th, 2026 Package sponsor
Exhibition booth
Sponsored Seminar
Coffee Break Sponsorship
Gala Dinner Sponsorship
Symposium sponsor
May 29th, 2026 Advertisement
・Program Booklet
・Smartphone Application
・Congress Bag
June 30th, 2026 Advertisement
・Promotional Banner on Website at Sponsor Page
・Flyer inserted in the congress kit
・Name Card Case Strap
・Main Entrance Banner
Q. What is a Symposium Sponsor?
A. The congress will feature 27 symposiums, and sponsorship opportunities for each symposium are also available.
For more information, visit CALL for SYMPOSIUM SPONSORS.
Q. What kinds of sponsorship opportunities are available for IHC 2026?
A. 7 types of sponsorship are available for IHC2026:
1. Package sponsor
2. Exhibition booth
3. Advertisement
4. Sponsored Seminar
5. Coffee Break Sponsorship
6. Gala Dinner Sponsorship
7. Symposium Sponsor
For details about each sponsorship opportunity, please refer to the prospectus links listed under the question “Where can I find the prospectus?” below.
Q. Where can I find the prospectus?
A. Please find the prospectus from the link below:
1. Package sponsor (English page8 / Japanese 8ページ)
2. Exhibition booth (English page9 / Japanese 9ページ)
3. Advertisement (English page11 / Japanese 11ページ)
4. Sponsored Seminar (English page15 / Japanese 14ページ )
5. Coffee Break Sponsorship (English page16 / Japanese 16ページ)
6. Gala Dinner Sponsorship (English page16/ Japanese 16ページ)
7. Symposium Sponsor (English / Japanese)
Q. How can I apply to become a sponsor for IHC 2026?
A. Please apply for sponsorship using the application form below:
Package Sponsor
Exhibition, Advertisement, Sponsored Seminar, Coffee Break Sponsorship, Gala Dinner Sponsorship
Symposium Sponsors
Q. When is the sponsorship application deadline?
A. The application deadlines for each sponsorship are as follows:
April 30th, 2026 Package sponsor
Exhibition booth
Sponsored Seminar
Coffee Break Sponsorship
Gala Dinner Sponsorship
Symposium sponsor
May 29th, 2026 Advertisement
・Program Booklet
・Smartphone Application
・Congress Bag
June 30th, 2026 Advertisement
・Promotional Banner on Website at Sponsor Page
・Flyer inserted in the congress kit
・Name Card Case Strap
・Main Entrance Banner
Q. What is a Symposium Sponsor?
A. The congress will feature 27 symposiums, and sponsorship opportunities for each symposium are also available.
For more information, visit CALL for SYMPOSIUM SPONSORS.