What powers theletter.jp?
Last seen Jun 2026 · 36 technologies across 16 categories
Analytics
Databases
Firebase
since Jul 2021
Font scripts
Google Font API
since Jan 2021
IaaS
Google Cloud
since Jul 2021
Issue trackers
Sentry
since Dec 2020
JavaScript frameworks
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Popper
since Apr 2022
PaaS
Amazon Web Services
since Aug 2022
Page builders
STUDIO
since Jul 2021
Programming languages
Security
Tag managers
Google Tag Manager
since Dec 2020
UI frameworks
Web servers
Nginx
since Dec 2020
Widgets
Audience
- 90% phone
- 10% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
6.42 / 10 · ranked #81,004 of all domains
247 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 11.8 MB · 110 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| horijun.theletter.jp | 19 |
| anna.theletter.jp | 17 |
| common-good.theletter.jp | 17 |
| itaru.theletter.jp | 17 |
| 30811.theletter.jp | 16 |
| burningneeds.theletter.jp | 16 |
| lp.theletter.jp | 16 |
| theletter.jp | 16 |
| akatsuki0721.theletter.jp | 15 |
| amamino-kurousa.theletter.jp | 15 |
| aoyamakobe.theletter.jp | 15 |
| asahi-writers.theletter.jp | 15 |
| atsu.theletter.jp | 15 |
| ayohata.theletter.jp | 15 |
| beauty-science.theletter.jp | 15 |
| chigaya1971.theletter.jp | 15 |
| chihiro-nishi.theletter.jp | 15 |
| china-biz-trend.theletter.jp | 15 |
| choeuphoria.theletter.jp | 15 |
| coco-letter.theletter.jp | 15 |
| daichi.theletter.jp | 15 |
| daisukeshigemi.theletter.jp | 15 |
| densenraisan.theletter.jp | 15 |
| die-acht.theletter.jp | 15 |
Full technology history →
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Recent changes
- dropped Priority Hints May 2026
- detected Radix UI May 2026
- detected shadcn/ui May 2026
- detected Priority Hints Feb 2026