O-Sakana Watch is an app that lets you easily check and compare seafood market prices across Japan.

[Key Features]
Check nationwide market prices in real time
- Automatically collects and updates price information daily from multiple markets, including the Okinawa Prefectural Fisheries Association, Sapporo Central Wholesale Market, and Fukuoka Central Wholesale Market.

Product Search
- Search for seafood you're interested in by name and compare prices at each market.

Watchlist
- Register your frequently purchased seafood to easily track price fluctuations.

Price Change Notifications
- Receive push notifications when the price of items on your watchlist changes.

Price Trend Graph
- View historical price data in a graph to understand price trends.

[Recommended for]
- Fishmongers
- Those who want to compare seafood purchase prices
- Those looking to purchase seasonal fish at a bargain price
- Those interested in market price trends