What powers letterme.tokyo?
Last seen Sep 2026 · 14 technologies across 11 categories
Analytics
Google Analytics
since Jun 2023
Databases
Firebase
since Jun 2023
Font scripts
Google Font API
since Jun 2023
IaaS
Google Cloud
since Jun 2023
JavaScript frameworks
JavaScript libraries
Miscellaneous
Open Graph
since Jun 2023
Page builders
STUDIO
since Jun 2023
Programming languages
Node.js
since Jun 2023
Tag managers
Google Tag Manager
since Jun 2023
Webmail
Google Workspace
since Jun 2023
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.78 / 10 · ranked #4,456,626 of all domains
10 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.6 s |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- CDN: Google
- Weight: 3.5 MB · 172 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Google (216.239.32.21, IPv6)
- Email: Google Workspace
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, ECDSA P256, expires Nov 2026
- Common Crawl link graph: rank 11,493,043, 2 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted