From a Nagoya garage · For American driveways · By Kenji Okada
Launch price ends in  --:--:--
Kenji Okada · Master Mechanic, Nagoya

TheKenji Method

The definitive manual: keep your Toyota or Honda running for 300,000 miles, and stop overpaying to do it.

210 pages, illustrated, in plain English. The old-school habits a Japanese master mechanic spent a lifetime learning, so you can cut $500–$1,500 a year off what your car quietly costs you. Most owners earn the price back the first time they say no to a single unneeded flush.

Get the Manual · $39 Read the math
Instant download · Pay once · Lifetime updates · 7-day money-back guarantee
210Illustrated pages
3-in-1Keep · Defend · Buy
300kThe mileage goal
210 PAGES
The Kenji Method, The Definitive Manual cover
I.
The Manual

Three books in one. Every dollar accounted for.

Keep the car you have alive for decades. Walk out of the service department with your wallet intact. And when the day comes, buy the next one right. 210 pages, illustrated throughout, written in plain English, with the intervals, the fair prices, and the exact words to say at the counter.

Illustrated PDF · 210 pages · Read on any device, print the cheat sheets

The Kenji Method — The Definitive Manual

$39$59 Launch price
Book One — Keep It Running. Fluids, the maintenance calendar, the 15-minute monthly check, the four ways an engine dies, brakes, tires, rust, and the driveway jobs.Maintenance
Book Two — Don't Get Robbed. How the counter works, the 20 repairs they'll try to sell you, a real estimate taken apart line by line, and the words to say no.The shop
Book Three — Choose It & Know It. How to buy right, which models last, and why Japanese cars earned their reputation.Buying
Illustrated throughout — diagrams for the belt vs chain, the cooling loop, tire wear, where rust hides, the 15-minute check, and more.30+ figures
Tear-out glovebox cheat sheets — the calendar, fair prices, the money phrases, the buyer's checklist.Printable
Lifetime updates — every future edition, free, forever.Included
You pay today$39
Get the Manual · $39
Secure checkout via Gumroad · Instant access · Yours forever
II.
The Math

What the counter costs you. And what it stops costing.

Pull out your last few service invoices and read them next to these. The left column is what a typical owner quietly pays in a year. The right is the same owner, same car, after the manual.

A typical ownerPer year
Dealer service visits, with the recommended list$700
Flushes, cleanings & add-ons agreed to at the counter$400
Marked-up filters, wipers & small parts$150
One avoidable failure, spread over five years$600
Annual$1,850
Based on average U.S. maintenance & repair costs and typical service-lane pricing.
The same owner, with the manualPer year
On scheduleThe real maintenance, at fair prices$450
DeclinedThe upsells, refused calmly with the scripts$0
DIYFilters & wipers, done in the driveway$40
PreventedThe failures the calendar catches early$0
Annual~$490
Every line has a chapter in the manual, with the intervals, the fair prices, and the exact words.
Net kept: $1,000–$1,400 a year — depending on your car, your area, and how much of the method you put to work. The manual costs $39, once.
III.
What's Inside

Three books, bound into one manual.

Read them in order, or jump to the one you need today. Each is plain English, illustrated, with real numbers and an honest note on what is worth your money and what is not.

Book One
Book One · Keep it

Keep It Running

  • Fluids in plain English, and the "lifetime fluid" myth
  • The maintenance calendar & the 15-minute check
  • The four ways an engine dies
  • Brakes, tires, rust, and the body
  • The driveway jobs the shop overcharges for
Book Two
Book Two · Don't get robbed

Don't Get Robbed

  • How the service counter really works
  • The 20 repairs they'll try to sell you, with verdicts
  • One real estimate, taken apart line by line
  • What a fair price looks like
  • The five lines that end the pressure
Book Three
Book Three · Buy right

Choose It & Know It

  • How to buy a used Japanese car right
  • Model profiles: which ones last, honestly
  • The pre-purchase inspection that never fails
  • Two Corollas, one wise buy: a worked example
  • Why these cars earned their reputation
IV.
About Kenji
Kenji Okada in his garage

Kenji Okada.

I spent my working life in a garage in Nagoya, keeping ordinary Toyotas and Hondas on the road long past the point where most people give up on a car. Where I come from, a car is not a payment. It is a tool you keep sharp for thirty years.

When I retired, I started explaining these habits to American and Canadian owners: the fluid schedules, the counter tricks, the quiet checks that catch a $40 problem before it becomes a $4,000 one. This manual is all of it, in one place, illustrated, in the order you should use it.

It is not an instruction set for becoming a mechanic. It is an instruction set for keeping more of what you earn.
Watch the channel
V.
Order the Manual

$39 once. No subscription. Yours forever.

Instant access, delivered by Gumroad the moment you pay. Read on any phone, tablet, or computer, and print the cheat sheets for the glovebox. If it is not for you, email within 7 days and the $39 comes back, no questions asked.

Illustrated PDF · 210 pages · Instant download · Lifetime updates

The Kenji Method — The Definitive Manual

$39$59Launch price
Book One — Keep It Running (maintenance)included
Book Two — Don't Get Robbed (the shop & your money)included
Book Three — Choose It & Know It (buying & models)included
30+ illustrations & tear-out glovebox cheat sheetsincluded
Lifetime updates, free foreverincluded
You pay today$39
Get the Manual · $39
🔒 Secure checkout via Gumroad · Visa · Mastercard · PayPal · Apple Pay · 7-day refund
VI.
FAQ

Questions owners ask before they click.

What exactly do I get?
One illustrated PDF of 210 pages, delivered instantly by Gumroad. It contains all three books, 30-plus diagrams, and the tear-out glovebox cheat sheets. It opens on any phone, tablet, or computer, with no app.
My car isn't Japanese. Is this still useful?
Mostly, yes. The maintenance logic, the dealership defenses, and the buying process apply to any car. The intervals, model notes, and reliability guidance are written specifically for Toyotas, Hondas, and other Japanese makes, which is where the method shines.
I'm not handy. Will I actually use this?
It assumes no tools and no experience. The biggest savings come from what you decline and what you check with your own eyes, a dipstick, a tire gauge, a flashlight. The few hands-on jobs are genuinely five-minute work, and each one is optional.
What are "lifetime updates"?
When I revise or add to the manual, you get the new edition free, forever. Keep your Gumroad receipt and you can always download the latest version.
Is this affiliated with Toyota, Honda, or any dealership?
No. It is independent educational material. It names no specific businesses, and it will tell you plainly when a dealership service is worth saying yes to, because the method only works if it is honest.
What if it's not for me?
Email within 7 days of purchase and you get the $39 back, no questions, through Gumroad's standard refund. Keep the cheat sheets with my blessing.
Last call

Stop paying for the part of the bill
you were never taught to question.

$39 once. 210 illustrated pages. Instant access. Lifetime updates. 7-day money-back guarantee. Most owners earn it back at their very next service visit.

Get the Manual · $39