Observed arrival · 2026-10-05

A Tokyo rooftop solar observatory, facing north

solarkansoku.com Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

A Tokyo homeowner shares measured output from a north-facing-heavy rooftop solar installation, alongside a clear-sky simulator and local sunshine data.

Landing page captured for the 2026-10-05 issue.

For: Tokyo homeowners weighing solar on constrained roofs
Worth noticing: The displayed 5.3 kW system is split across 3.6 kW north, 1.0 kW east, and 0.7 kW south-facing panels.

Field notes

The homepage identifies the home as a Tokyo 23-ward detached house and separates its array into north, east, and south capacities. Its data navigation includes monthly totals, 30-minute readings, sunshine hours, and theoretical comparisons; the latest display also pairs generation with a Tokyo sunshine-duration reading. The site says its 2026 output figures are measured data.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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