Use cases · 事例
Six people. Six Japans. One companion.
The clearest way to see what Yuki is for is to watch it work on a real question. Below are six unedited scenarios drawn from actual sessions.
01
Aiko · First-time traveler
Sydney → Kyoto, November
Prompt
“Plan a 7-day Kansai loop that doesn't miss Nara but stays under ¥120,000.”
Outcome
Yuki drafted a day-by-day route with JR pass math, ryokan holds in Higashiyama, an Arashiyama momiji-peak morning, and an Osaka izakaya night. Two follow-up messages tuned it around a bad-knee constraint.
7-day plan · ¥118,400 · 3 rewrites · 11 minutes
02
Marco · JLPT N4 learner
Milan · 2 years studying
Prompt
“I keep confusing に and で. Can you drill me until I stop?”
Outcome
Yuki opened with the core rule, ran a 12-question mini-quiz inline, marked what Marco missed, and stored the pattern in memory so it revisits the same points next week without being asked.
Memory: 3 grammar points tracked · N4 → N3 track active
03
Priya · Backend engineer
Bangalore → Tokyo, 2028
Prompt
“I want to move to Tokyo in 2028 as a backend engineer. Build me the roadmap.”
Outcome
Yuki generated a milestone timeline — JLPT N3 by Q2 2027, SES-friendly agencies shortlisted, Setagaya-vs-Suginami rent comparison, savings runway to ¥1.8M. The roadmap lives in her library and updates as she checks off milestones.
Roadmap: 14 milestones · 22 months · saved to library
04
Jun-ho · Prospective student
Seoul · MEXT applicant
Prompt
“Compare MEXT and Japanese-government-adjacent scholarships for a CS masters.”
Outcome
Yuki produced a side-by-side of MEXT-Embassy, MEXT-University, ADB-JSP, and Panasonic Scholarship — stipend, coverage, language requirement, application window, past-year acceptance signal.
4 programs compared · 6 disqualifiers flagged
05
Sam · Just landed
Nakano, Tokyo · week 1
Prompt
“How do I actually set up my life this week? Hanko, bank, phone, my-number.”
Outcome
Yuki produced a five-day ordered checklist with ward-office hours, which bank accepts residence card same-day, phone plans without a Japanese credit card, and where to order a hanko in Nakano.
5-day setup · 12 tasks · saved as document
06
Elena · Long-term resident
Fukuoka · 4 years
Prompt
“Draft a formal email declining a client meeting without offending them.”
Outcome
Yuki wrote it in full keigo, explained each honorific choice line-by-line, and offered a slightly warmer alternative for an existing client vs a cold introduction.
Register: 敬語 · line-by-line rationale · 2 variants
Who is Yuki for?
Written for the people actually going.
Travelers
Season-tuned itineraries that respect budget, mobility, and taste.
Language learners
Graded practice that remembers what you already know.
Job seekers
Visa timelines, rirekisho, and recruiter-ready keigo.
Students
Scholarships, language schools, dorm rules, part-time limits.
New arrivals
Hanko, my-number, ward office, garbage rules — day-by-day.
Long-term residents
Legal Japanese, formal email, kids' school, tax quirks.