Welcome to Amida-san - Fair and Transparent Lottery Drawing

Amida-san is a web service for creating and sharing online amidakuji.

What You Can Do with Amida-san

1. Easy Sharing and Participation via URL

Create an event and share the URL -- that's all it takes to invite participants. Each person enters their name and adds rungs to join. Once everyone is ready, the administrator starts the draw.

2. Transparent and Fair Drawing

Since all participants add rungs together, no one can manipulate the results. Because everyone contributes to building the amidakuji, there's a strong sense of trust. Whether it's company events, school activities, or gatherings with friends, it delivers a drawing that people genuinely trust.

3. Support for Large Groups

Up to 299 participants can join, and the interface is easy to use even on smartphones. Participation status can be checked in real time.

4. Various Use Cases

From event lotteries for prize distribution and winner selection, to project team and group work assignments, role assignments like task rotation, duty schedules, and moderator selection, presentation and speech order determination, to seating arrangements for social gatherings and parties -- Amida-san is useful in a wide range of situations.

5. Amida 3D (Premium Option)

A dynamic 3D animation designed for large groups, where balls roll through three-dimensional space in an exciting display. The suspense of not knowing the result until the very end adds to the thrill.

Recommended For

Amida-san is ideal for event organizers who want to ensure transparency in draws, teachers and instructors who want to fairly divide groups or determine order, project managers who want to conduct fair team formation, and party planners who want a fun way to decide seating or roles.

Amida-san offers mathematically proven fairness as a free online amidakuji tool. Experience fair decisions that everyone can agree on.