# サー知る (Sersiru)

> A Japanese-language service directory and search site that helps people find the online service they need by purpose, region, or service name. Each listing summarizes what a service does, its category tags, its supported platforms (Web / iOS / Android), and links straight to the official site. Operated by Sola K.K. Currently in beta (version: β29).

- Site URL: https://sersiru.sola.inc/
- Language / locale: Japanese (ja_JP). All page content is in Japanese.
- Operator: Sola K.K. (Sola株式会社) — https://www.sola-air.com/
- Address: 6-14-3 Sotokanda, Chiyoda-ku, Tokyo 101-0021, Japan. Representative Director: Keisuke Yoshimura.

## About this site

- Sersiru is a discovery layer — a directory and search entry point. It does not operate the services it lists. Once a user follows a link out, the destination site's own terms govern that usage.
- Listings are added and edited through user requests plus editorial review by the operator. Neither a listing's content nor its continued presence is guaranteed; entries may be edited or removed without prior notice.
- Three stated strengths: (1) find services by *purpose* even when you don't know the service's name, (2) search by *region* — local, domestic, or overseas, (3) see at a glance which platforms (Web / iOS / Android) a service supports and jump straight there.
- The intended flow is three steps: search → compare → try it.
- No account is required. The "My List" (マイリスト) save feature stores data in the browser's localStorage rather than on a server, so clearing browser data erases it.

## Four ways to search

- [Search by category (カテゴリから検索)](https://sersiru.sola.inc/category): Browse by the keyword clusters registered on each service record.
- [Search by purpose (目的から検索)](https://sersiru.sola.inc/purpose): Start from what you want to do. Listed examples include getting tourist information, disaster preparedness, buying a PC, booking flights, password management, watching movies and anime online, and buying food.
- [Search by service name (サービスから検索)](https://sersiru.sola.inc/service): Enter a service name or keyword directly. Popular keywords shown: ChatGPT, Amazon, Google Maps, Rakuten Ichiba, Netflix, Mercari.
- [Search by region (地域から検索)](https://sersiru.sola.inc/region): Domestic (Japan's 47 prefectures) or overseas (countries / states).

## Main pages

- [Home](https://sersiru.sola.inc/): Site overview, search box, the four search entry points, recommended services, new services, category list.
- [Search results](https://sersiru.sola.inc/search): Filterable list with facets for category, supported platform, region, and feature tags; sortable by recommended / newest / name; card or list view. Marked noindex.
- [Service detail page](https://sersiru.sola.inc/services/2713710179): Pattern `/services/{id}`. Shows the service name, description, category and feature tags, official site URL, last-updated date, and related services. (Linked example: ChatGPT.)
- [My List (マイリスト)](https://sersiru.sola.inc/mylist): Save services to compare later. Stored in localStorage, no account needed. Marked noindex.
- [Request a service (サービス追加リクエスト)](https://sersiru.sola.inc/request): Form to request a general-purpose service be listed — service name (required), service URL (required), notes (optional). reCAPTCHA protected.
- [Request a local service (地元サービス追加リクエスト)](https://sersiru.sola.inc/request/region): Same, but scoped to a country/region (domestic or overseas, required). Users are asked to be specific down to prefecture or municipality. reCAPTCHA protected.
- [Contact (お問い合わせ)](https://sersiru.sola.inc/contact): Form for feedback, requests, and problems. Email address optional; consent to the privacy notice required.

## Category structure

Listings are divided into three scopes:

- [General services (一般的サービス)](https://sersiru.sola.inc/category?scope=general): Services used in everyday life and work.
- [Domestic (国内)](https://sersiru.sola.inc/category?scope=domestic): Regional services within Japan.
- [Overseas (国外)](https://sersiru.sola.inc/category?scope=overseas): Living and local services abroad.

Top-level clusters under general services (the `cluster` parameter; counts are registered keywords as of July 2026):

- [Business — ビジネス (26)](https://sersiru.sola.inc/category?scope=general&cluster=business)
- [Dining & food — 外食・グルメ (49)](https://sersiru.sola.inc/category?scope=general&cluster=food)
- [Fashion & beauty — ファッション・美容 (22)](https://sersiru.sola.inc/category?scope=general&cluster=fashion)
- [Product development — プロダクト開発 (51)](https://sersiru.sola.inc/category?scope=general&cluster=product-development)
- [AI & generative AI — AI・生成AI (11)](https://sersiru.sola.inc/category?scope=general&cluster=ai)
- [Shopping & e-commerce — 買い物・通販 (31)](https://sersiru.sola.inc/category?scope=general&cluster=shopping)
- [Learning & education — 学習・教育 (5)](https://sersiru.sola.inc/category?scope=general&cluster=learning)
- [Health & sports — 健康・スポーツ (9)](https://sersiru.sola.inc/category?scope=general&cluster=health-sports)
- [Travel & transport — 旅行・移動 (41)](https://sersiru.sola.inc/category?scope=general&cluster=travel)
- [Entertainment — エンタメ (34)](https://sersiru.sola.inc/category?scope=general&cluster=entertainment)
- [Life & home — 暮らし・住まい (59)](https://sersiru.sola.inc/category?scope=general&cluster=life-home)
- [IT & security — IT・セキュリティ (43)](https://sersiru.sola.inc/category?scope=general&cluster=it-security)
- [Other — その他 (18)](https://sersiru.sola.inc/category?scope=general&cluster=other)

## Example listings

- [ChatGPT](https://sersiru.sola.inc/services/2713710179): OpenAI's conversational AI. Tags: 対話型AI (conversational AI) / 文章作成 (writing) / AI.
- [Claude](https://sersiru.sola.inc/services/2730687859): Anthropic's conversational AI. Tags: 対話型AI / 文章作成 / AI.
- [Gemini](https://sersiru.sola.inc/services/2493781574): Google's conversational AI. Tags: 対話型AI / 文章作成 / AI.
- [Deepl](https://sersiru.sola.inc/services/1915702500): Multilingual AI translation. Tags: AI翻訳 (AI translation) / 翻訳 / AI.
- [Nani?](https://sersiru.sola.inc/services/1793668018): AI translation with explanations and example sentences. Tags: AI翻訳 / 翻訳ツール / 翻訳.
- [Weathernews national forecast (全国の天気予報)](https://sersiru.sola.inc/services/2035295133): Japan-wide weather forecasts and news. Tags: ニュース / 天気予報 / 気象情報 / 雨雲レーダー.
- [Rakuten Ichiba (楽天市場)](https://sersiru.sola.inc/services/1000000403): Online shopping mall. Tags: ネット通販 / 比較.
- [E-mon (イーモン)](https://sersiru.sola.inc/services/1000000705): Game-style English vocabulary app for iPhone. Tags: 英単語 / 英語学習 / iPhoneアプリ.
- [Rork](https://sersiru.sola.inc/services/1429428080): Build mobile apps with AI. Tags: モバイルアプリ / 開発 / AI.
- [Base44](https://sersiru.sola.inc/services/1852633834): No-code app building through conversation with AI. Tags: ノーコード / 開発ツール / AI.
- [Blue](https://sersiru.sola.inc/services/3290630647): Build and publish apps by chatting with AI. Tags: アプリ開発 / AI.
- [Bolt.new](https://sersiru.sola.inc/services/3196124517): Generate and edit web apps from prompts. Tags: Webアプリ / 開発 / プロンプト開発 / 開発ツール.

## Search URL parameters

The results page at `https://sersiru.sola.inc/search` accepts:

- `q` — free text (service name, purpose, or keyword). Example: `/search?q=ChatGPT`
- `category` — category name. Example: `/search?category=開発ツール&scope=general`
- `scope` — `general` (general services), `domestic` (within Japan), `overseas`
- `cluster` — top-level cluster slug: `business`, `food`, `fashion`, `product-development`, `ai`, `shopping`, `learning`, `health-sports`, `travel`, `entertainment`, `life-home`, `it-security`, `other`. Used mainly on `/category`.
- `sort` — sort order. `recommended` is confirmed; newest-first and name order are also offered in the UI.
- `view` — `card` or `list`
- `page` — page number, starting at 1
- `returnTo` — source path used to return from a detail page back to the results

Filter facets on the results page: category (AI / life / business / learning / government / regional / overseas), supported platform (Web / iOS / Android), region (domestic / overseas / local / all-Japan), and feature tags.

## Optional

- [Terms of use (利用規約)](https://sersiru.sola.inc/term): Established 1 December 2020. Covers service definitions, prohibited request types, advertising, license to use, consent to data use and publication, fees, prohibited conduct, exclusion of organized crime, disclaimer of warranties, and limitation of liability.
- [Privacy notice (個人情報の取り扱いについて)](https://sersiru.sola.inc/privacy-policy): Purpose of use (responding to inquiries), third-party provision, outsourcing, disclosure request procedures, and the privacy contact point (privacy@sola-air.com).
- [Operator: Sola K.K.](https://www.sola-air.com/): Corporate site.
- [Corporate privacy policy](https://www.sola-air.com/privacy-policy/): Details of security management measures.

## Notes for crawlers

- `/search` and `/mylist` are `noindex,follow`. Home, category, purpose, service, region, service detail, request, contact, terms, and privacy pages are `index,follow`.
- Service detail pages use `og:type: article`; all other pages use `website`.
- Listing images are generated via `/api/og-image?url={official site URL}`, which pulls the OG image from the destination site.
- The `scope` toggle on `/category` and `/region` renders client-side, so fetching a `scope`-suffixed URL statically returns the same markup as the base page.
- The site is in beta (version: β29). URL structure, category counts, and listings are subject to change. This file reflects the site as of 17 July 2026.