Jason Kobayashi
I’m Jason Kobayashi, a web app engineer in Tokyo. I like building practical tools that help people make real progress, especially in language learning. I use AI heavily as leverage, not as decoration. The goal is simple: think better, build faster, and spend more time on what actually matters.
How I think
I’m a pragmatic person. I believe long-term effort pays off, whether that is Japanese, engineering, or finance. Action matters. If you keep studying, you start to notice patterns and understand things from angles you could not see before. That is why I care about focus, repetition, and tools that help people keep moving.
Why I built Mastermind Japanese
I learned Japanese before today’s study apps and internet resources were really available. A lot of it was dictionaries, physical flashcards, classes, TV, and repetition. Mastermind Japanese is my attempt to bring the pain points out earlier and build a practical platform that helps learners, especially Western learners, understand what matters and improve over time. I want to keep making it better with real learner feedback. AI helps me improve the product faster, but it is just a tool. What matters is whether the product actually helps your Japanese.
Why it matters
I hope this becomes the main thing I do. If I can build something genuinely useful, keep improving it with the people who use it, and support my family by doing work that matters, that is the outcome I want.
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Feedback
Once you’ve joined and logged in, you can send feedback from the main user menu. If something helps, confuses, or breaks, tell me. Real feedback beats polite silence every time.