Kohaku Koi

Overview

Kohaku is a koi variety with pure white skin carrying red (hi) patterns, often treated as the standard against which other koi are judged. 'Koi keeping begins and ends with Kohaku,' goes the Japanese saying: beginners buy one first, masters spend lifetimes chasing the perfect one.

Natural History

The founding variety of modern nishikigoi, fixed in 1890s Niigata, Japan from red-and-white mutations of food carp; every koi show's Grand Champion lineage runs through Kohaku.

Appearance

To 60-90 cm in ponds; snow-white base with crimson patterns - judged on the red's depth and edges (kiwa), the white's purity, and pattern balance nose-to-tail. Classic patterns have names: nidan (two-step), sandan (three-step), inazuma (lightning).

Tank Size & Setup

A pond, full stop: 5,000+ liters for a few koi, 1+ meter deep, with serious filtration - koi are big, social, messy carp that live decades. Netting against herons; plants are salad, not decor.

Water Parameters

4-25°C seasonal range handled easily; the real requirements are volume, oxygen, and filtration turnover. Koi survive winters iced-over given depth and an air hole.

Diet

Quality koi pellets seasonally adjusted (wheat-germ in cold, growth food warm), plus treats - they hand-tame delightfully and beg like retrievers.

Health & Lifespan

Average lifespan is 25-40 years. 25-40 year lifespans are normal, legendary individuals far older; health is pond health - quarantine newcomers, watch for parasites and KHV (buy from reputable dealers).

Pros & Cons

Pros

• The definitive koi: timeless
• Hand-tames and greets you
• Extraordinary lifespan
• Entry point to a deep hobby

Cons

• Needs a real pond and budget
• Show-quality costs like art
• Herons agree they're visible
• A decades-long commitment