N.K. Digital Solution — Tokyo, Japan

Debugging
Japan's Corporate OS — for engineers & agencies worldwide

The hardest part of Japan isn't the language
— it's everything that isn't said.
I build the tools and frameworks to decode that gap.

// stack.overview
Background Ex-JTC Engineer
Expertise ECU / OBD
Tools Built 4 Live Calculators
Location Tokyo, Japan
Tax Year 2026 Ready

Technical Strategist.
Former Automotive ECU Engineer.

A unique dual background — from the R&D lab to the classroom, now building digital infrastructure for the Japanese market.

N.K. Profile

My name is N.K. Born and raised in Japan, I spent several years working as an engineer at a major Japanese automotive OEM (JTC), specializing in ECU specification design and global technical compliance — particularly for North American market requirements (CARB/OBD).

Prior to engineering, I held official teaching licenses in Mathematics and Technical/Industrial Education. This dual background lets me do more than "explain" Japanese culture — I decompose it into logical, structured frameworks.

I witnessed a recurring pattern: brilliant international engineers struggling not because of technical skills, but because of the obfuscated codebase of Japanese corporate culture. That's what I set out to fix.

ECU Spec Design CARB / OBD Compliance System Logic STEM Education JTC Workflows HSP Visa Tax 2026

Technical Logic Strategist

Translating Japanese corporate architecture into logical frameworks that international engineers can act on.

2026 Tax & Visa Precision

All calculation tools are updated for 2026 regulations — net income, pension, national health insurance, and HSP visa point scoring.

Educator Background

Licensed in Mathematics and Technical/Industrial Education. Every framework is designed to teach, not just inform.

Bridge Between Worlds

Served as a critical interface between Japanese engineering teams and international regulatory bodies.


What I Can Build for You.

Two distinct service tracks — career strategy for individuals targeting Japan, and technical screening for agencies. Everything is async, text-based deliverables — no live calls required.

FOR INDIVIDUALS

Built for engineers at any stage: job-hunting from overseas, currently employed in Japan and hitting friction, or weighing whether to make a move at all. Documents, interview prep, or an ongoing sounding board — whatever the situation calls for, I bring an Ex-JTC engineer's perspective to it. Pick the depth that matches your stage, not a fixed track.

00 — TRIAL

Mini Diagnostic

Not sure what you even need? Start here, low-cost.

  • Send a document or a short description of your situation
  • 1-page written feedback, delivered within 48 hours
  • Recommendation on whether NAVIGATE / APPLY / ANCHOR fits your case

BENEFITAvoid overpaying for the wrong package. Get an expert read on your situation at low risk before committing further.

$50 / diagnostic (48-hr delivery)
※ $25 credited toward NAVIGATE, APPLY, or ANCHOR if you upgrade within 14 days
01 — NAVIGATE

Career Diagnostic Report

Isolate which system is actually broken — in writing.

  • Submit an intake form (situation, friction points, direction you want)
  • 1–2 page written diagnosis delivered within 48 hours (priority breakdown + next actions)
  • Fits any stage: job search, in-role friction, or a career-change decision
  • 1 round of follow-up questions included

BENEFITMost career problems in Japan aren't skill problems — they're unlogged context. A single report is often enough to identify what's actually blocking you, and whether the fix is a document, a conversation, or a decision.

$200 / report (48-hr delivery, 1 follow-up round)
02 — APPLY

Document & Interview Package

Know your exact market value, then walk into the interview prepared — pick the modules you need.

  • Module: Target company tier & salary range assessment
  • Module: Professional Japanese 職務経歴書 (Work History) creation, engineer-to-engineer tech stack translation
  • Module: Async interview answer review — submit a self-recorded video (Japanese only), get scored feedback & model answers from an Ex-JTC Engineer
  • 1 round of revisions/follow-up included per module selected

BENEFITSignificantly increases document passing rates and removes cultural blind spots before they cost you the offer — mix and match only the modules your situation needs.

$450 — Target company analysis & salary range assessment only
$600 — 職務経歴書(Work History) creation only
$600 — Interview answer review only
$1,400 — Full package (all three) $250 OFF
※ Async · PDF & Google Docs delivery · 48-hr turnaround per module
03 — ANCHOR

Monthly Advisory

Not job-hunting — just want an insider to think things through with, month to month.

  • For engineers currently employed who want to resolve workplace friction without changing jobs
  • Written async advisory — up to 3 exchanges per month, as situations come up
  • Recurring monthly check-in report, delivered in writing
  • Cancel or pause anytime — no long-term contract

BENEFITGives in-role engineers a standing outside perspective on Japanese workplace dynamics — without committing to a job change or a one-off diagnostic.

From $600 / month

FOR AGENCIES

Built for two kinds of agency work: placing engineers from overseas into Japan, and supporting foreign engineers already working in Japan through a job change. Candidate technical fit, cultural/retention risk, JD translation — whatever the specific question, I bring an Ex-JTC engineer's perspective to it. Pick the depth that matches your need, not a fixed topic.

00 — QUICK CHECK

One Question, Answered

Send one question, get a straight answer — no topic restriction.

  • Send a single question by text (candidate fit, retention risk, JD wording, or cultural-fit for an overseas placement — anything in scope)
  • Works for both inbound placements (overseas engineer → Japan) and foreign engineers already in Japan considering a job change
  • Written reply within 24 hours
  • No follow-up rounds included — a fast, low-commitment way to test the fit

BENEFITA low-cost way to get an expert read on a specific question before deciding whether a deeper engagement is worth it.

$85 / question (24-hr response)
※ $40 credited toward DEEP DIVE or ADVISORY if you upgrade within 14 days
01 — DEEP DIVE

Full Written Consultation

A proper look at a real problem — candidate evaluation, retention risk, JD rewrite, or anything similar.

  • Submit an intake form describing the situation (candidates, JD, or process question)
  • Covers overseas-to-Japan placements (cultural fit, workplace readiness) or job changes for foreign engineers already in Japan (technical fit, JD accuracy)
  • 2–3 page written report delivered within 48–72 hours
  • Up to 2 rounds of follow-up questions included

BENEFITGet a thorough, expert-backed answer to a specific recruiting problem — delivered as a document your team can act on directly.

$650 / report (48–72-hr delivery, 2 follow-up rounds)
02 — ADVISORY

Monthly Advisory

An ongoing resource for whatever comes up, at a fixed monthly scope.

  • A set number of QUICK CHECK / DEEP DIVE requests per month, agreed at contract — sized to your volume, whether that's a handful of candidates or a batch of N candidates per month
  • Covers candidate evaluation, retention-risk review, JD language, or other questions as they arise — whether the candidate is overseas-sourced or already based in Japan
  • Scope fixed in advance — no open-ended, unlimited consulting
  • Out of scope: live calls/meetings, candidate sourcing or scouting, contract or salary negotiation on your behalf, and same-day emergency turnaround (24-hr response is handled via QUICK CHECK)

BENEFITA predictable monthly cost for ongoing access to an engineer's perspective on your pipeline — without the overhead of hiring one in-house.

From $1,500 / month
※ Request volume fixed at contract

Let's Build
Something Precise.

For agencies, partnerships, and individuals ready to refactor their Japanese career.

Professional Inquiries

Typical response within 24–48 hours. For urgent matters, please note in the subject line.

📍
Location Tokyo, Japan
Response Time 24–48 hours
🌐

Responses within 24–48 hours

Message Sent ✓

Thanks for reaching out. I'll be in touch within 24–48 hours.