Contents
All Guides
Everything we've published in English so far. Each guide is adapted from our Japanese originals for American water, fish and stores.
Japanese Fish & Style
Medaka Care: The Complete Guide to Japanese Rice FishStart here: indoor or outdoor, water, feeding, seasons, and breeding
Medaka Varieties: A Guide to Japan's Rice Fish Types35 varieties, every one hand-illustrated, and how to read their names
Male or Female Medaka? How to Tell (and Why It Matters)The dorsal-fin notch, the anal fin, and why keepers sort their fish
Medaka Eggs: How to Hatch Them and Raise the FryOur most-read guide in Japan: the degree-day rule, fungus control, fry care
Why Do My Medaka Keep Dying? Causes and Fixes from TokyoThe five killers, and why a medaka sits on the bottom
Raising Medaka Fry: Getting Them Past the First MonthHariko to juveniles: feeding, containers, and the two-week wall
Medaka Tank Mates: Shrimp, Snails and Fish That WorkWhich shrimp, snails and fish can share a tank with medaka, and which never should
Keeping Medaka Without a Filter: Japan's Low-Tech MethodBowls, tubs and foam boxes where plants and sunlight do the filter's job
The Japanese Container Pond: Build a Medaka BiotopeThe balanced mini-pond Japan keeps on its balconies
How to Culture Green Water: Japan's Fry-Raising MethodAomizu, the deliberate algae that raises stronger fry
Goldfish · From Japan
Rare Fancy Goldfish: 10 Varieties Prized in JapanTosakin, Jumbo Oranda, the green goldfish project, and how to read the names
The Japanese Salt Bath (Ensui-yoku): A Complete Guide0.5% by the gram, the first response in Japanese goldfish keeping
Shrimp & Fish Health
Amano Shrimp Care: From the Shrimp's Home CountryFeeding, tank mates, and the truth about breeding
Fin Rot: Symptoms, Treatment, and Why It Keeps Coming BackThe Japanese 0.5% salt bath, dosed correctly in US units
Ich (White Spot): Treatment That Works, the Japanese WayWhy timing beats dosing, and the heat-and-medication cure
Swim Bladder Disorder in Goldfish: The Digestion LinkTenpuku-byo, a gut problem that sounds like an organ problem
Cherry Shrimp Care: Colors, Breeding, and What Kills ThemThe colorful shrimp that breeds in plain freshwater
Betta Tank Mates: What Can Live With a Betta?The honest yes/maybe/no list, and the six conditions that work
Basics · Start Here
How to Dechlorinate Tap Water: Chlorine vs ChloramineWhy the sun-bucket trick fails on US water, and what to do instead
20 Best Freshwater Fish for Beginners: Cheap and HardyRanked by hardiness, for a first community tank
10 Hardy Goldfish for Beginners: A Guide from JapanThe tough festival fish that let you learn, not the fragile show breeds
The Aquarium Cleanup Crew: Shrimp, Snails, and Fish That CleanMatch the animal to the algae with the pairing table pros use
