CSS 2026: Registration Site

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Registration Deadlines

Early-bird Rate

September 11, 2026 (Fri)

Regular Rate

September 30, 2026 (Wed)

Late / On-site Rate

October 23, 2026 (Fri) 10:00 am

* CSS 2026 does not arrange your accommodation. We kindly ask you to arrange your own lodging.

Fees

Registration Fee

[Prices include consumption tax]	Early-bird Rate	Regular Rate	Late / On-site Rate
SIG-registered Member⁽¹	33,000 JPY	39,600 JPY	48,400 JPY
Member⁽²	36,300 JPY	41,800 JPY	48,400 JPY
Non-member (General)	39,600 JPY	49,500 JPY	58,300 JPY
IPSJ Junior Member	0 JPY⁽³	0 JPY⁽³	0 JPY⁽³
Student Member^{(4, 5}	15,400 JPY	22,000 JPY	27,500 JPY
Student Non-member⁽⁵	18,700 JPY	25,300 JPY	33,000 JPY

Banquet Fee (scheduled to start at 18:00 on Thu, Oct 22)

[Prices include consumption tax]	Early-bird / Regular / Late or On-site
General (Member & Non-member)	9,900 JPY
Student	4,950 JPY

A SIG-registered member is a member of the IPSJ-SIG Computer Security Group (CSEC) or the IPSJ-SIG Security Psychology and Trust (SPT). We encourage you to register for the CSEC and SPT SIGs on this occasion.
- SIG registration page: https://www.ipsj.or.jp/kenkyukai/toroku.html
- Those who complete the SIG registration are eligible for the SIG-registered member rate.
"Member" refers only to those belonging to IPSJ (Member), IEICE (regular/associate member), IEEJ (General/Associate), IEIJ (regular member), or ITE (Regular member). Please note that Supporting Members (IPSJ, IEIJ), sustaining members (IEICE), Corporates (IEEJ), and Retained Members (ITE) are outside the scope of "Member".
- How to join IPSJ as a Member: http://www.ipsj.or.jp/nyukai_kojin.html
- Memorandum on mutual cooperation among societies: https://www.ipsj.or.jp/annai/kanrenlink/oboegaki.html
An IPSJ Junior Member is a member under the "Junior Member Program" that IPSJ has been piloting since FY 2015.
- About IPSJ Junior Membership: http://www.ipsj.or.jp/member/junior.html
A student member refers to those belonging to IPSJ (Student Member), IEICE (Student Membership), IEEJ (Student), IEIJ (Student Member), or ITE (Student Member).
Students do not include those admitted through special selection for working adults or similar systems.
A Web ID cannot be shared among multiple people, but you may pay the registration fees for multiple people in a single bank transfer. To pay for multiple people together, please email the following to css_finance（ａｔ）conferenceservice.jp in advance.
1. List of participants' Web IDs
2. Name used for the bank transfer
3. Scheduled transfer date
The payment deadline for bank transfers is the same as the registration deadline. If the payment deadline passes, your registration will be automatically updated (changed). This is also stated on the invoice.
The payment deadline for bank transfers is the same as the registration deadline.

Registration Agency

Registration and fee collection are handled by Conference Service Inc. on behalf of the organizers. "Conference Service Inc." will appear on your credit card statement.

Cancellation Policy

September 11, 2026 (Fri) is the cancellation deadline. Cancellations are accepted until this date; please be sure to email css_finance（ａｔ）conferenceservice.jp and include the Web ID you used when registering. Please note that bank transfer and payment processing fees are borne by the participant. September 12, 2026 (Sat) onward, cancellations cannot be accepted for any reason.

How to Register

1. Create a Web ID for this conference

All presenters and participants must first create a Web ID dedicated to this conference. You will use this Web ID to register and to submit presentations. One Web ID per person is sufficient; a single ID can be used for one person's registration and multiple presentation submissions. If email from noreply[_a_t_]easycongress.com (please correct the [_a_t_] part) is treated as spam, please configure your mail environment so that you can receive messages from this address.

Create a new Web ID

2. Register using your Web ID

Use the Web ID you created to register. This ID cannot be shared among multiple people. Those who wish to submit a presentation must first complete registration. Note that you can submit a presentation before paying the registration fee.

If you register first and pay by credit card later, close the page after completing registration. To pay by credit card later, enter your Web ID and password again from "Register or update your registration here" below. If you selected credit card payment during registration but have not yet completed payment, you can make the credit card payment from the Dashboard.

You can change your registration even after registering. Log in again from "Register or update your registration here" below to make changes. However, please note that you cannot change the fee category after paying the registration fee.

3. Dashboard

On Dashboard you can download invoices, receipts, and certificates of attendance under the conditions below. Links to the web proceedings and the online meeting room (Zoom) are also shown.

Dashboard is set up so that you can pay the registration fee and the banquet fee using different payment methods. Accordingly, even if you selected bank transfer, a link to pay by credit card is shown until the secretariat confirms your payment. Also, if you pay the registration fee and the banquet fee separately, you can download separate invoices and receipts for each.

After registration: you can download the invoice
After the system recognizes your payment: you can download the receipt
October 10, 2026 onward: you can download the web proceedings
During the conference: you can download the certificate of attendance
During the conference: a link to the online meeting room (Zoom) will be shown

Go to Dashboard

4. Presentation submission

Please submit presentation and demonstration applications, and upload your manuscript, from the URL below.

Go to presentation submission

Frequently Asked Questions (FAQ)

Q1:

I forgot my password.

A1:

You can reset your password from this link.

Q2:

I forgot my Web ID or Login ID.

A2:

When your Web ID was issued, we sent you an email titled "(css2026) Web IDを発行しました(Your Web ID has been issued)". That email contains your Web ID and Login ID. If you have deleted it, please contact css_sysadmin（ａｔ）conferenceservice.jp.

Q3:

I would like to include specific text (a company name, a company name plus an individual name, etc.) in the billing address.

A3:

On the page for issuing invoices and receipts, there is a feature that lets you add the billing addressee. Please use it.

Q4:

Must the bank transfer be under an individual's name? Can I transfer from a company account?

A4:

The account name used for the transfer is not limited to an individual's name. However, if it is not an individual's name, we may be unable to link the transfer to your Web ID; in that case, please notify the following to css_finance（ａｔ）conferenceservice.jp (Finance).

Web ID
Name of the transfer account
Scheduled transfer date

You may also transfer the fees for multiple people at once. In that case, please email us the following:

Web IDs for all participants
Name of the transfer account
Scheduled transfer date

Q5:

Can I pay the registration fee by bank transfer and the banquet fee by credit card?

A5:

Yes. If the payment methods differ between the registration fee and the banquet fee, please select "Bank transfer". Even if you select bank transfer, a credit card payment link is shown on Dashboard, so you can pay by credit card from the Dashboard after completing registration. If the transfer is not under your own name, please provide your Web ID, the transfer account name, and the scheduled transfer date to css_finance（ａｔ）conferenceservice.jp (Finance), as noted above.

Q6:

Can I pay the registration fee and the banquet fee with different credit cards?

A6:

Yes. Please select "Credit card" as the payment method. The credit card payment link shown immediately after registration is for lump-sum payment only, but three credit card payment links are shown on Dashboard. If you pay using the "Pay by credit card (registration + banquet) here" link, the registration and banquet fees are settled together, and a combined receipt can be downloaded from the Dashboard after payment. On the other hand, if you pay separately using the "Pay by credit card (registration fee) here" and "Pay by credit card (banquet fee) here" links, you can download separate invoices for the registration and banquet fees from the Dashboard.

Q7:

Could you issue separate receipts for the registration fee and the banquet fee?

A7:

If you pay or transfer the registration fee and the banquet fee separately, you will be able to download separate receipts for each from Dashboard. If you pay or transfer them together, the receipt downloadable from the Dashboard will combine the registration and banquet fees. If you paid or transferred them together but would like separate receipts, please contact the secretariat's finance staff with your Web ID.

Contact

株式会社カンファレンスサービス/Conference Service Inc.
Tel: 092-986-4867
E-mail — System Administrator (technical questions): css_sysadmin（ａｔ）conferenceservice.jp
E-mail — Finance (invoices, receipts, and other financial questions): css_finance（ａｔ）conferenceservice.jp
E-mail — Secretariat (other inquiries): css_secretary（ａｔ）conferenceservice.jp

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