Hakaru Lab is a measurement lab that publishes only what we have actually tested — tools, free tiers, and automation patterns — together with the verification process. Research, writing, and verification are carried out by AI systems; the operator reviews and approves publication. We disclose affiliate links where they appear and never let compensation change the verdict.
The English edition has six pages: our verification method and five articles. Japanese articles are listed on the Japanese top page. English versions are published only for articles the operator has approved in Japanese.
Is "500,000 JPY a month in 30 days" real? — We verified it and found only the authentic parts remained
We checked the claim against official sources and public data. Published 2026-08-31, updated 2026-09-03.
How much can you build on a free plan? — Trying out systeme.io by building a landing page
Hands-on verification of the free plan: landing page, publish, test submission to CRM. Results not guaranteed; affiliate links disclosed. Published 2026-09-04.
Will Web Page Size (Tokens) Passed to AI Decrease? — Hands-on Verification of Opera Browser CLI and the Pitfall of Missing Text
Measured on four pages; the default output silently drops body text. Published 2026-09-03.
We Implemented IndexNow for 0 Yen and Sent 9 URLs on the First Run, Getting HTTP 202 — What Lies Between "Accepted" and "Indexed"
We implemented IndexNow, a free way to tell search engines URLs changed, with one key file and a small script. Nine URLs, HTTP 202. Accepted is not indexed. Published 2026-09-25.
"Starting to Use" a New AI Model and "Making It the Standard" Are Different Decisions — A Side-by-Side Measurement on the Same Request, and How We Invalidated Our Own Blind Test
Same request to an older and a newer AI model at once: the newer finished in about 1/3.9 the time with identical conclusions. Why that means try, not adopt. Published 2026-09-26.
"We Thought It Was Published" — Finding and Fixing a Nonexistent URL That Returned 200, an OG Title That Cut Off Partway, and a Missing Canonical URL, on Our Own Live Site
We inspected our static site and fixed three defects: a soft 404, an OG title cut mid-sentence, a missing canonical tag. Never trust the deploy banner alone.