Productivity

Kaku

Last updated 2026-07-15 · benchmark measured 2026-09-10 — deterministic & reproducible

Kaku is a desktop app that corrects Japanese grammar, particles, keigo, and tone.

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To cite this score: legit.show/s/kaku-pro/2026-09-10. That address never changes; this page moves with every re-measure.

Legit.Show scored Kaku 90/100 on 2026-09-10, measured across 5 of 7 frames from its public surface. legit.show/s/kaku-pro/2026-09-10

Is Kaku production-ready?

Legit.Show scores Kaku 90 out of 100 — the simple average of its 5 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Kaku (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Security; its weakest is Standards. 5 of the seven frames returned a score; Performance and Accessibility were not measurable on this service and are recorded as null — not as zero. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — not measurable on this service (null — not scored as 0)
• Accessibility — not measurable on this service (null — not scored as 0)
• Security — 100/100
  How this compares across the catalogue: The Web Security Baseline
• Privacy — 75/100
  How this compares across the catalogue: The Privacy Gap
• Reliability — 100/100
• Standards — 75/100
• Discoverability — 100/100

What we measured

• Security headers present: CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 1326 ms to first byte.
• Returns a proper 404 for unknown routes.
• 3 of 3 sampled routes reachable.
• Has a reachable privacy policy.
• Sets cookies / loads scripts with no consent prompt.
• Discoverable: structured data, sitemap, OpenGraph image, canonical URL.

Who built it

Kakuprotech

Who it's for

Japanese language learners · Professional writers · Business communicators · International professionals · macOS and Windows users

Pricing

Free (5 AI rewrite credits/day) or Pro at $7.17/month (5 free credits/day + 2,000 monthly credits)

Sources and updates

Description

Taken from kaku.pro's own website on 2026-07-15.

Benchmark

Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-09-10.

Put together from public information, without Kaku's involvement. If anything here is wrong, tell us and a person will check it.

Visit Kaku → · Alternatives to Kaku → · How this was measured →