You do not need to read the PDF. Find the total (合計), the panel size (kW) and the battery size (kWh), and tick what the quote mentions. The rest is arithmetic.
Public range for 5 kW and 10 kWh, installed
¥2,600,000
Your quote.
Inside the public range
Between ¥2,000,000 and ¥3,800,000 for this size. A second quote still tends to move the price.
No Tokyo subsidy line
Tokyo pays ¥120,000 to ¥150,000 per kW and ¥100,000 per kWh in FY2026. A quote that does not show it is a quote that has not planned the pre-application.
No pre-application date
The Tokyo grant requires a pre-application before the contract is signed. The quote should say who files it and when.
No national subsidy line
National programmes can stack on top of Tokyo. Ask whether the installer is registered to file it.
Range: ¥200,000 to ¥400,000 per kW (2026-07-23), ¥100,000 to ¥180,000 per kWh (working range). Flags are prompts for your next conversation with the installer, not a verdict.
Installers price by roof, not by nationality. The only thing that changes is who answers the phone.
Japanese comparison services send your request to two to five installers and confirm it by phone, in Japanese. If a partner or housemate can take that call, this is the cheapest route to three quotes. Copy this summary and hand it over.
Tell us the roof and the ward. We pass it to one installer with an English-speaking salesperson who covers Tokyo, and to nobody else. They file the Tokyo pre-application. Reply usually within three working days.