A peaceful Japanese garden management game. Build your own koi pond, collect rare fish breeds, and find tranquility in the daily rhythm of feeding and growing your fish.
Open the Shop tab and purchase koi fry. You start with ¥200 and basic breeds are available immediately — Kohaku (white & red), Ogon (gold) and Bekko (spotted). Rarer breeds unlock as you earn more ¥ and buy upgrades.
Click "Feed All" or tap individual fish in the pond each day. Fish that aren't fed show a warning (!) and won't grow that day. Hungry fish cost you time — consistency is key to building a profitable pond.
Press "Next Day →" to advance time. Fed fish grow one stage. Each breed has different growth speeds — Kohaku are quick to mature, while rare Butterfly Koi take much longer but are worth vastly more.
Each fish grows through 6 stages: Fry → Fingerling → Small → Medium → Large → Premium. A Premium Kohaku sells for ¥100, but a Premium Butterfly Koi fetches ¥1,600! Wait for Premium before selling for maximum profit.
Invest in 4 upgrades: Water Filter (fish grow 20% faster), Air Pump (2 extra capacity slots), UV Light (unlocks rare Showa, Tancho & Butterfly breeds), and Aquatic Plants (all fish sell for 10% more). Each transforms your strategy!