Koshin StudioDraft Party
Scout rookies by their abilities. Tie with someone? Lottery!
A draft day for everyone, in your browser.
Free. Runs in your browser, no install or sign-up. Available in Japanese, English, Korean and Traditional Chinese.
What it is
Name your team and pick fictional rookies. In Round 1 everyone bids at the same time, hidden from the others, and all bids are revealed together. If teams chose the same player, they draw lots: the competing teams take turns picking one hidden paper, and when everyone has picked, all papers open at once. Only the winner gets the rights; the others re-bid on a different player.
From Round 2, teams pick one at a time, and the order flips every round. At the end, the contract talks are announced — “signed” or “refused”. You can turn your result into an image and share it on X.
Looking for a draft game or a draft simulator? The flow and rules are laid out on their own pages: Baseball draft simulator.
Two modes
Scout mode
First, each participant raises their own player through three years of high school. Form and luck change the results, and training the same stat repeatedly can unlock special skills. The raised players join everyone else’s and the CPU’s in the draft (yours can be drafted by you only in the final round, if it is still there), and when one is picked, its owner decides whether to sign or refuse.
Pick fictional rookies by their abilities, potential and records. The abilities are the scouts’ estimates and can differ from reality. Signed players grow over several years while every team plays every other team. You get yearly standings, head-to-head records against every team, titles such as batting champion and wins leader, Rookie of the Year and draft grades — revealed to everyone at the same time, so you can react together with stamps and chat. The host can also register the players.
Choice mode
Pick from a list the host prepared — for example, everyone in your class or 50 favorite anime. Great for groups of friends.
After the draft: careers and the world ranking
When the draft ends you can read how each drafted player’s life turned out: a breakout rookie year, a climb up from the minors, a trade, a comeback after being released, a move overseas, and finally retirement. You see each team’s headline pick first, and can open everyone’s. The events and endings you find collect in a “career log”.
Players eyeing the majors may refuse to sign, and an “omen” can appear before the result is announced — though sometimes they sign anyway.
Your draft becomes a Draft Score (the CPU teams’ average is 50) and enters the world ranking (today, this week, all time). Rooms with the standard settings (12 teams, 6 rounds) count; “multiplayer” (two or more humans) and “solo” are separate boards. You can share the result on X as an image card.
With friends, or with strangers
- Friends room: enter with a 6-character room code or a link. The host freely chooses the number of teams, rounds, time limit, refusals and mode, and nothing starts until the host presses Start. A public room is listed so strangers can join. The host can also remove anyone who causes trouble.
- Find an open room: browse public rooms and see their rules (teams, rounds, time limit, refusals) before you join.
- Quick join: don’t want to search? One tap puts you in an open room, or starts one with CPU teams so there is no wait.
Every team gets an original emblem automatically (you can pick another), and you can use your own image in any room (inappropriate images are hidden after reports).
How it is built
The server (Cloudflare Workers with Durable Objects) runs all the progress and judging. Round 1 bids are not sent to anyone until the reveal, and the winning paper of a lottery is known only to the server until everyone has drawn. Even the host cannot peek at bids or rig a lottery. There is no login, and the sound effects and music are generated in the browser (no audio files).
The players in Scout mode are fictional people generated at random each time. They have no connection to real players, teams or results, and this game has no connection to any professional league or team.
What is stored
For the sake of play inside a room, a device-generated number, your team name, what you pick, chat messages and the room settings are kept only for the life of that room, and are all deleted 10 minutes after the game ends. The world ranking records only your team name, Draft Score, grade (S–D) and date when a game ends (no device number and no chat). When you share an image card on X, the shared result image and its text are kept on the server for 7 days. Details are on the privacy page.