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Recursive provided development and implementation support for Choice AI, a conversational AI agent leveraging the OpenAI API, for "Furusato Choice", Japan's largest Furusato Nozei (hometown tax donation) platform operated by TRUSTBANK. The details of this collaboration, including initiatives and outcomes, are now featured on OpenAI's website
Furusato Nozei, or hometown tax donation, is a Japanese system introduced in 2008, that allows residents to donate to local governments of their choice in exchange for income tax or residence tax deductions. Donors can select how their contributions are used and receive thank-you gifts such as local specialties, food, or crafts. Designed to revitalize local economies and bridge the tax gap between urban and rural areas, the system also encourages greater awareness of how taxes are used while helping communities promote their unique regional appeal.
The core goal of this project was to implement Choice AI on the "Furusato Choice" platform, which proposes the most suitable return gifts to donors from a selection of over 760,000 items. Recursive was responsible for designing and implementing a multi-agent architecture, enabling Choice AI to deliver optimal suggestions even when faced with users' ambiguous needs. As a result, users who utilized Choice AI achieved a significantly higher conversion rate compared to those who used standard site search functions.
The article recently published by OpenAI details the successful technical approach of this project, includes an interview with our software engineer, and explains the multi-agent mechanism that contributed to the notable increase in conversion rates.
For a deeper look into out AI expertise and technical capabilities, check out the full article on OpenAI's website, available here.
Founded by a former senior research engineer at Google DeepMind, Recursive brings together world-class talent from across disciplines to engineer results where others can't.





