All Guides

Everything we've published in English so far, and what's on the way. Each guide is rewritten from our Japanese originals for American water, fish and stores — never machine-translated.

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 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 The Japanese Container Pond: Build a Medaka BiotopeBiotope — the 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 of 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 wearing a broken-organ name 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 — where to start 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 — the pairing table pros use

Plants & Aquascaping

20 Easy Aquarium Plants for Beginners (Low-Tech, No CO2)Fifteen of the twenty grow with no CO2 injection at all Aquascaping Basics: The Layout Rules the Pros UseThe Japanese art the world now calls aquascaping — triangle, convex, concave

The Launch Set — In Production

• How to Cycle an Aquarium: Beneficial Bacteria Explained by ProsBasics
• Green Aquarium Water: Causes and How to Fix It for GoodWater Problems
• Marimo Moss Balls: Care Guide from Their Home CountryJapanese Fish & Style

Twenty-one guides at launch, then two to three new guides every week.