is the term applied to a Kohaku, Sanke, or Showa whose only
red marking is a round patch of red on the head. Tancho koi
are highly-prized among hobbyists, especially the Japanese,
because they resemble Japan's flag and national bird.
No other red marking must appear anywhere else. The red patch
must be as round as possible, and should not reach the
shoulder nor the nose of the fish.
All color criteria applicable to non-Tancho Kohaku, Sanke, or
Showa are applicable to the Tancho type.
All pattern criteria applicable to non-Tancho Kohaku, Sanke,
or Showa are applicable to the Tancho type with the addition
of one rule: no other red marking must appear on the koi
except for the round patch on the Tancho's head. The head
patch must be as round as possible. It must also be centered
between the eyes, and must not extend to the nose or to the
shoulder of the koi.
Please see separate article on
The Ideal Koi Body.
Tancho Kohaku (left) and Tancho Sanke (right)