About This Game

Koishi’s Fishing Journal is a Touhou Project fan-made desktop idle fishing game starring Koishi Komeiji. Let Koishi relax and fish in a corner of your desktop. Even while you work, study, or do other things, she will keep fishing and bring back all kinds of catches.

Relax and Fish, Decorate Your Desktop

There’s no need to watch the game all the time. Koishi keeps fishing on your desktop; check back now and then to see what she has caught today, then let her carry on at her leisure. You can also choose your favorite decorations for Koishi and decorate her little fishing corner on your desktop. Let Koishi keep you company in a look you like while you work or study, adding something fresh to your familiar desktop.

Relax and Fish with Friends or Strangers

Invite friends to your room, or find strangers to quietly idle with. Bring everyone’s Koishi together on your desktop, with up to 12 players fishing together. Chat as you fish and enjoy multiplayer bonuses, or enable shared clicks to give each other a hand with fishing. Take a break from work or study to chat now and then and see how many fish everyone has caught.

From Ordinary Fish to Mermaids

The waters are home to species of all shapes and sizes. The most common ordinary fish can be used directly as cooking ingredients, while rarer merfolk species provide precious cooking ingredients that ordinary fish cannot. Among the merfolk is an exceptionally rare, highest-tier species—mermaids.
Keep discovering new fish and merfolk, expand your species collection, and seek out those rarely seen species.

Cook Dishes and Sell Them in Your Shop

Turn the ordinary fish you catch and the precious ingredients obtained from merfolk into a variety of dishes, then put the finished dishes in your shop to sell automatically. Spend your earnings on upgrades to make fishing easier and give yourself a chance to encounter more rare fish and merfolk.
Check back now and then to see your new catches, cook dishes, and restock your shop, then let Koishi carry on fishing at her leisure.

Set up your chefs to cook automatically and earn money with ease. You can also run a stall yourself, complete orders, and earn substantial income.

Fish, cook, and collect merfolk. Enjoy a leisurely desktop fishing life with Koishi.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

A small portion of the game's art assets were generated by AI.
For most of the game's art assets, AI-generated concept art or reference images were used solely as creative references during production. The final art assets used in the game were redrawn and processed by hand.
Some in-game text and its corresponding localized translations were generated using AI.
Some background music was generated by AI.