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. While you work, study, or do other things, she’ll keep fishing and bringing back all kinds of catches.

Relaxing Fishing on Your Desktop

There’s no need to keep watching the game. Koishi will continue fishing on your desktop, so just check back from time to time to see what she has caught and let her carry on.

From Ordinary Fish to Mermaids

The water is home to all kinds of creatures. Ordinary fish can be used directly as ingredients for cooking, while rarer merfolk provide precious ingredients that ordinary fish cannot. Among them are the rarest and highest-tier species of all—mermaids.
Discover new fish and merfolk, fill out your species collection, and seek out the rarest creatures hiding beneath the water.

Cook, Sell, and Grow

Turn ordinary fish and precious ingredients obtained from merfolk into a variety of dishes, then put them up for sale in your shop. Use your earnings to upgrade your fishing and make it easier to encounter even rarer fish and merfolk.
Check back occasionally to see what you’ve caught, cook some dishes, restock your shop, and let Koishi return to her peaceful fishing.

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

AI Generated Content Disclosure

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

Some game artwork was created with the assistance of AI-generated concept art or reference images during development. These were used solely as creative references, and all artwork used in the final game was manually redrawn and processed. AI-generated images are not used directly.
Some game text and its corresponding localized translations were generated using AI.