You're Losing to a 19th-Century Race
The headline anime of spring 2026, "Steel Ball Run," has finally been adapted.
A 6,000 km horseback race across the American continent in the late 19th century. Competitors ride on, risking their lives.
—So, how about you?
You have five students, each with their own lesson days, times, subjects, progress, and tuition fees—all managed in Excel or a planner. At the end of the month, you open a spreadsheet and try to recall, "Wait, did I actually have a lesson last Tuesday?"
Managing students in modern Japan is arguably more grueling than a 19th-century transcontinental race.
- Miscounted last month's lessons and sent the wrong invoice amount
- Getting a LINE message every week asking, "When's the next lesson again?"
- Asking yourself before final exams, "What have we been covering lately?"
Gyro Zeppeli carved his path with the Spin of his steel balls. What you need isn't a steel ball—it's automation.
Manual Work vs. Automation—A Transcontinental Race Analogy
| Category | Manual (Horse & Buggy) | Kagemusha System (The Spin) |
|---|---|---|
| Lesson records | Handwritten in a planner, or manually entered into Excel later | Automatically recorded just by adding events to Google Calendar |
| Student info management | Scattered across notebooks, spreadsheets, and LINE | Automatically consolidated in a spreadsheet |
| End-of-month tallying | An hour of manual calculations | Auto-tallied. Zero minutes |
| Invoices | Copy-paste editing in Word | Auto-generated PDFs |
| Monthly cost | Free (but costs massive amounts of time) | ¥500 (but gives you time back) |
Managing students manually is like crossing the American continent by horse and buggy. You might get there eventually, but you'll be worn out by the time you arrive.
Student Management with Kagemusha in 3 Steps
STEP 1: Add Lessons to Google Calendar
Just create an event like "Taro – Math" in the Google Calendar you already use. No special app required. Works from your phone or PC.
STEP 2: Kagemusha Automatically Records & Tallies
Based on your calendar data, lesson counts, hours, and subjects are automatically compiled per student in a spreadsheet. No more "When was that lesson again?"
STEP 3: Auto-Generate Invoices at Month-End
Generate parent-facing PDF invoices from the compiled data with one click. Zero calculation errors.
"But Can't I Just Do It by Hand with Only Five Students?"
Even Johnny Joestar gathered intel on the "Corpse Parts" before the race began. Preparation is something you do before you need it.
Automation by the Numbers
No student personal data is ever sent to external servers. Everything stays within your own Google account. This is a core design principle of the Kagemusha System, directly addressing tutors' real concern: "I don't want to hand over personal information."
It's Time to Leave the 19th Century Behind
The racers in Steel Ball Run kept running toward the finish line. Your finish line should be "delivering the best possible lessons to your students."
Student management and invoice creation aren't the goal. They're the desert you have to cross along the way.
Will you trudge through the sand on foot, or use the power of the Spin to blast through?
Why not try the ¥500/month "Spin" for yourself?
👉 Learn more here
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