83 Days of Silence. Then 6 Minutes.
Yesterday's La Liga match against Alavés.
Real Sociedad's Takefusa Kubo returned to the pitch for the first time in 83 days. After roughly three months recovering from a left hamstring injury, he recorded an assist just 6 minutes after coming on and was named Man of the Match.
Six minutes. He erased 83 days of absence in just six minutes.
…Now let me ask you something.
How many minutes does it take you to create invoices every month?
Counting lesson sessions per student, multiplying by your hourly rate, adding transportation costs, entering it all into Excel, converting to PDF, attaching it to an email…
While Kubo was getting his assist in 6 minutes, you were still typing numbers into the first cell of your first invoice.
Manual Invoicing Actually Takes This Long
You might think "it's not that much work." But when you actually measure it, here's what you get.
| Task | Manual | Kagemusha System |
|---|---|---|
| Tallying lesson count | Scroll back through your calendar and count (10 min) | Auto-tallied from Google Calendar (0 min) |
| Calculating amounts | Hourly rate × sessions + transportation per student (15 min) | Auto-calculated in spreadsheet (0 min) |
| Creating invoices | Manual entry into template → export to PDF (20 min) | PDF auto-generated (0 min) |
| Sending | Compose email → attach → send (10 min) | One click or auto-send (1 min) |
| Total (5 students) | ~275 min (4.5 hours) | ~5 min |
With 5 students, that's 4.5 hours every month. Over a year, that's 54 hours—more than two full days sacrificed to invoicing.
By that math, Kubo could rack up 540 assists in 54 hours (rough estimate).
"But I Already Have an Excel Template"
An Excel template is "semi-automatic," not "automatic." It's like Kubo only doing physical training during rehab but never stepping onto the pitch. Unless you take that final step, it doesn't count as an assist.
Auto-Generate Invoices with Kagemusha System in 3 Steps
① Log Lessons in Google Calendar
Just like managing your regular schedule. Add the student's name and subject to each event. That becomes your attendance data.
② Open the Spreadsheet at Month-End
Calendar data is already tallied automatically. Lesson counts, amounts, and transportation costs per student—all laid out in one view.
③ Generate PDF Invoices
One click generates PDF invoices. All that's left is sending them to parents.
That's it. Setup takes 5 minutes.
Kubo needed 83 days for his comeback because his injury required time to heal. But automating your invoicing doesn't take 83 days. It takes 5 minutes.
The Power of Automation in Numbers
For ¥500/month, you reclaim 54 hours a year. That works out to roughly ¥111 per hour—cheaper than a can of coffee.
Kubo's estimated annual salary is ¥400 million. One assist in 6 minutes means… actually, let's not go there. The comparison would be insulting (to us).
By the Way, Today Is "Attack on Titan Day"
Today, April 12, the Rakuten Eagles are hosting "Attack on Titan Design Day." Hiroshi Kamiya, the voice of Levi, is apparently throwing the ceremonial first pitch.
Captain Levi would probably say:
"Your invoicing has too many wasted movements. Cut them."
Let's follow the Captain's teaching and eliminate the waste. Automate everything you can about end-of-month invoicing. That's the "optimal strike."
Kubo's comeback assist took 6 minutes. Your invoice automation can start in 5.
👉 Try the Kagemusha System
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