Voice Katsu

Everyone's Statistics

A statistics site where you can view everyone's answers just by answering questions that interest you.

SUGUDASU lottery

A free tool that conducts a lottery without uploading a roster externally and can also save evidence as a PDF.

OhOi Web Search

A simple data search website

BOAT RATING｜ボートレーティング

This is a data site for boat racing predictions. It has unique data not found on other boat racing sites, such as original rating points and turn mark arrival predictions.

FormatArc - Easy Data Conversion

FormatArc is a lightweight site that processes JSON formatting, YAML conversion, and CSV conversion only within the browser. Input data is not sent to the server, and formatting and conversion can be completed on the spot.

Anything

A web application designed to capture fleeting thoughts, organize them, and connect ideas and thoughts related to Jev to create new ideas.

OneQ - 毎日、たった一問。

毎日、たった一問。 みんなの本音データを、毎日ひとつずつ。 匿名で、かんたんに、リアルな実態を可視化します。

Attendance Management Tool

Set candidate dates for an event and aggregate participants' availability. Respondents answer with ○△× (available, somewhat available, unavailable), and the most convenient date is highlighted. You can easily collect responses through a shared URL.

世界各国データ ランキング (World Country Statistics)

Is Japan's population not as large as I thought? The world's "now" at a glance! A pop and fun world countries data ranking 🌍✨ Check population, land area, and population density with graphs at a glance!

Machi no Tobira - Reading Japan Through Numbers

AI analyzes and explains government statistical data. Daily updated data journalism

Famous Quote Generator

This is a web app that automatically generates natural and emotional quotes by combining word and grammar data. You can enjoy meeting different words each time with just a button press.

Sales and Demand Forecasting AI "SalesCast" | CSV/Excel / Free, No Registration Required

Proprietary integrated forecasting model delivers advanced sales predictions in seconds—free

iconside — Icon Association Quiz

A guessing game quiz that everyone can play together

AnalyWallet

A simple household budget app that is free and ad-free

mock-exam

Server-free static page quiz app. Supports custom question import and result saving.

SUGUDASU (quick release)

Complete in your browser only. No registration required. Input data is not sent externally. Handle the practical tasks that freelancers, store owners, office workers, and event organizers want to finish quickly—all within this browser.

Twitter User Opinion Poll

A voting site where you can anonymously rate and evaluate X users on likes/dislikes across 8 categories

Saturn — 日本企業データを、スプレッドシートとAPIで

Metric Cast - Data Prediction Web App for Individual Developers

This is a data prediction web app for individual developers‼️ Google Analytics / Search Console / Ads Compatible with Stripe / App Store / Google Play‼️

Shift Schedule Creator

Easily create staff shift schedules in your browser. Features include period selection, color-coded display for early shifts, late shifts, and night shifts, automatic counting of working days. Supports CSV export and printing.

Credit card uses

This is a household finance analysis web application that automatically categorizes credit card statements and visualizes monthly spending.

Testa - App Mutual Testing Community

Are you struggling to gather testers for closed testing of your Android app? This is Japan's first mutual testing community where everyone can pass by testing each other.

Web Logic Simulator

Just a circuit simulator. You can make calculators, games, anything.

CSVocab — Custom Vocabulary Notebook

This is a web app where you can create your own personal vocabulary notebook just by pasting CSV files or text. You can easily register content by simply copying and pasting in the format "question,answer", and you can efficiently repeat learning on difficult problems.