MEDIA
Lifehacker Japan publishes interview with Ami Otsuka in Today's Work Hack
On February 21, 2025 Lifehacker Japan published an interview with author and app developer Ami Otsuka (representative of Hundreds LLC) in its Today's Work Hack series, titled "ChatGPT is a tool that time-leaps the effort you would have had to make: how Ami Otsuka, whose life changed through the #100 Days Challenge, uses AI." It was written by Takuya Suzuki.
The article reports that Otsuka accesses ChatGPT around 80 times a day and subscribes to the top-tier plan at roughly 30,000 yen a month.
On how she started, the article records that she first tried to get ChatGPT to write a university report for her.
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- Published February 21, 2025; last updated April 22, 2025.
About Ami Otsuka
Author and app developer; representative of Hundreds LLC. Starting in October 2023, while a student at Chuo University, she built an app a day with ChatGPT for 100 consecutive days and posted each one to X, a record published as #100 Days Challenge: I Built 100 Apps in 100 Days and My Life Changed (Nikkei BP, 2025). Named to Forbes JAPAN's Women In Tech 30 in 2026. She is now based in Thailand, writing, speaking and building apps.
