Scan or Upload. Done.
Scan with auto-capture. Upload a photo or a PDF you already have.
納付金額 38,500円
Or just forward it
Japanese emails and their attachments arrive already translated, filed and ready to act on.
A translation worth keeping
Read for meaning, structured like the original.
It finds what you owe
Payments, deadlines and appointments, pulled out of the letter automatically.
Find it without the kanji
Search in English or romaji. Tag and file everything you've ever received.
Talk it over with the AI assistant you already use.
Once connected, it can read and search your documents, so you can ask about any letter without uploading or explaining it again.
Quiet, considered software
Life Stack Japan builds small, focused products. Independent, self-funded, made in Tokyo.
Four principles
Independent by design.
Small, self-funded, accountable to users, not to investors or timelines we did not set.
Useful before novel.
We reach for AI when it solves a real problem, not to decorate one.
Built from lived experience.
Every product begins with a friction we have felt ourselves.
Quiet software.
Tools earn their place by staying out of the way.
What we make.
Life Stack Japan
Blog
Notes on life in Japan and on building mailmana. No posts yet.