One koi, one record.
Keep a record of where each koi came from and how it grew. Breeder, bloodline, size over time, show results and day-to-day care, all in one record.
Get the launch email
We will send one email when we launch. Nothing else.
See our Privacy Policy for how we handle what you enter.
Mock-up (in development)
Kohaku — called “Hana”
- Breeder
- ◯◯ Koi Farm (Ojiya, Niigata)
- Bloodline
- ◯◯ line
- Acquired
- October 2024
- Length
- 42cm → 58cm
- Show
- 2025 Young Koi Show, 65cm class — first place
What you can keep
A whole life, in one record
Provenance
Breeder, bloodline, region, purchase date, dealer and a photo of the certificate. It all passes on to the next owner.
Growth
Length and weight plotted over time, with top-view photos lined up year by year.
Care
Feeding, salt baths, treatments, quarantine and water changes, each with a date and a note. Water readings per pond are optional.
Show history
The show, the class, the size division and the result, tied to the fish itself.
How this differs from what exists
How this differs from what exists
Provenance, not water chemistry
Apps built around pond water already exist. Koi Karte is built around where this one fish came from and how it grew.
No cap, and yours to take
There is no limit on how many koi you register, and you can export everything to CSV or PDF whenever you like.
From the home of koi
Variety names, regions and care terms sourced in Japan. Usable in Japanese and English.
Pricing (planned)
Start with one koi, free.
Free
$0forever
Register one koi. Provenance, growth, care and show history are all included.
Hobbyist
$5per month
No limit on koi. Multiple ponds, growth charts and CSV export.
Pricing and contents may change by the time we launch.
Where did this koi come from, and how did it grow?
When we launch, you will be the first to know.
Get the launch email
We will send one email when we launch. Nothing else.
See our Privacy Policy for how we handle what you enter.