Speaking at JP_Stripes Connect 2026 — The Reality of Building and Billing AI Products, in Yokohama

On August 1, 2026, I attended JP_Stripes Connect 2026 in person at Iwasaki Gakuen Information Technology College in Yokohama, and spoke at the track session 'The Reality of Building and Billing AI Products.' This post summarizes the topics I covered (building AI products in production, and designing token-based and usage-based billing on Stripe), along with the full list of URLs I referenced on stage.

JP_Stripes Fukuoka Vol.12 Presentation Report ~ Pioneering Stripe API Migration with Speculative Implementation × AI

I recently presented at JP_Stripes Fukuoka Vol.12 with the title 'Pioneering Stripe API Migration with Speculative Implementation × AI.' I shared a case study on how we visualized Stripe API migration risks using AI and efficiently promoted the project in a safe manner. This article shares the content of that presentation.

Researching the Stripe Customer Portal Official Demo Site

Based on our implementation experience with Giselle, we researched the Stripe Customer Portal official demo site. We introduce the features you can experience in the Customer Portal, such as subscription management and payment method updates.

Stripe Local Fukuoka - The Reality of B2B Payments in Japan and the Evolution of Stripe

I attended Stripe Local Fukuoka and learned about the latest trends in payment processing and B2B transactions. Stripe can process single payments up to 99,999,999 JPY, and B2B credit card transactions in the range of 10,000 to 99,999,999 JPY are more common than you might think. I also shared my experience of building Tax, Subscription, and Radar features from scratch before Stripe offered them natively.

[Stripe] About Refund Cancellation/Reversal Processing

Stripe refunds can't be cancelled — the workaround is to re-charge via Create Payment in the Stripe dashboard.