Hangetsu

半月 · Hangetsu

Literally: „Half of the moon, half-moon“

Also known as: Ban Wol

The Shotokan half-moon kata: gliding, arc-shaped steps in the hangetsu dachi stance, slow breath-controlled movements and fast series of techniques. Under the older name Seishan.

Quick Facts

Martial Arts

Karate Shotokan

People

Gichin Funakoshi · Modified by

Form typeKata

OriginJapan

Period of origin19th century, 20th century

CharacterBreath and tension, Hard and soft

About the kata

Hangetsu means half-moon; JKA material says the kata took its name from the semicircular movements of the arms and legs. Its basis is the stance hangetsu dachi: the JKA describes it as somewhat narrower than zenkutsu dachi, with both feet and knees turned inward. The English Wikipedia calls it the Shotokan counterpart of sanchin dachi, longer but with the same tension and internal knee rotation. Gliding the feet along an arc marks the whole kata. JKA material counts 41 movements, about a minute of practice, and two kiai shouts; karatevancouver.ca gives 32 movements, and we assume the difference comes from the way of counting. According to the JKA, fast and slow techniques alternate in the kata, and the movements of both arms and legs are governed by the breath. Wikipedia describes the first part as slow, with strong breathing and emphasis on hara, and the second as dynamic, with series of punches and mae geri kicks. According to the English Wikipedia, Gichin Funakoshi included Hangetsu in the Shotokan curriculum in place of the kata Sanchin, because both rest on the same principle of contraction and expansion. On the 2024 WUKF list, Hangetsu belongs among the sentei katas for Shotokan.

The kata in different styles

Style	Name in the style	Movements	Kiai
Shotokan	Hangetsu	41	2

Meaning of the name

Han means half and getsu moon, including in the sense of a calendar month, as karatevancouver.ca states; the English Wikipedia therefore translates the name as both "half-moon" and "half a month", relating it to the stance and the semicircular steps. The older name Seisan or Seishan (十三) means thirteen. Interpretations such as "13 hands" or "13 steps" have, according to Wikipedia, no historical support. Historyoffighting.com mentions a theory linking the number to the thirteen-day intervals of the moon's cycle; we have not been able to find support for it.

Creator and history

Historyoffighting.com calls Hangetsu possibly the oldest kata in karate: it reached Okinawa through the Naha-te school, but its origin is unknown. One theory derives it from a Chinese folk dance about the tides, another from the form Four Gate Hands, still practiced today by the southern mantis style. Wikipedia links Seisan to the white crane of Yong Chun in Fujian province and adds that this connection is entirely unsupported. According to Wikipedia, Gichin Funakoshi studied under Sokon Matsumura, Kodatsu Iha and Seisho Aragaki, who all knew some version of Seisan. Sources disagree on who renamed the kata. Themartialway.com.au and kenseikancanada.org attribute the name Hangetsu to Funakoshi. Historyoffighting.com points out that in his 1922 book Ryukyu Kenpo Karate the kata still appears under the name Seishan, while other katas already carry their new names.

Differences between styles

A number of styles practice Seisan under their own names. According to the English Wikipedia, the Uechi-ryu version builds on the sanchin dachi stance and knee techniques, the Goju-ryu version is more complex and focused on close combat, and the Shorin-ryu versions, derived from Sokon Matsumura, use the shiko dachi stance. On the 2024 WUKF list, Seisan stands among the sentei kata for Goju-ryu, among the tokui kata for Shito-ryu and Shorin-ryu, and Seishan among the tokui kata for Wado-ryu. Korean Tang Soo Do practices the kata under the name Sei-Shan or Ban Wol, the Korean translation of hangetsu. GKR Karate teaches hangetsu dachi roughly a foot longer than sanchin dachi, with the hips turned 45 degrees and about 60% of the weight on the front leg.

Bunkai – applications

JKA material states that the footwork in Hangetsu serves to penetrate between the opponent's legs and to break his balance. Themartialway.com.au and kenseikancanada.org agree in describing the bunkai as close-range fighting, in which the hangetsu dachi stance is used to step between or around the opponent's legs. GKR Karate sees in the kata an avoidance of leg sweeps and a barging into the opponent with a block instead of a strike; the final technique, in which the hands form a half-moon, it reads as a lock or a leg break.

Competition status

Sport karate (WKF) — Official kata list · valid from 1/1/2026 ↗
WUKF (World Union of Karate-Do Federations) – Shotokan — Sentei (selected) · valid from 4/26/2024 ↗

Common Mistakes

One does not fall into the hangetsu dachi stance: the weight shift during the step must be governed by muscular control, not merely by shifting the center of gravity.

Key Tip

At the end of each movement the body should stiffen like concrete and then relax, without losing the shape of the stance.

Technique Sequence — Shotokan

Breakdown source: jkakarate.co.uk

Related katas

Variant of: Seishan

Further sources on this topic (12)