A bokken (木剣, bok(u), "wood", and ken, "sword"), is a wooden Japanese sword used for training, usually the size and shape of a katana, but sometimes shaped like other swords, such as the wakizashi and tantō. Bokken (木剣) is a term for Bokutō in Japan, but is widely used in the west. Ken (剣) is used, at the beginning of a word, for terms having to do with the sword as in Kendō (剣道 "way of the sword") and Kenjutsu (剣術 "art of the sword"). In contrast, tō (刀) is used as a suffix as in shōtō (小刀:しょうとう, short sword) and daitō (大刀:だいとう); thus bokutō (木刀, "wood sword") is the most common terminology, as is used in Japan.
Bokken are also used in the AJKF Nihon kendo kata, a form of training to develop technically correct movements.
In 2003, the All Japan Kendo Federation (AJKF) introduced a type of practice using bokken. Bokuto Ni Yoru Kendo Kihon-waza Keiko-ho is a set of basic exercises using a bokuto. This form of practice, is intended primarily for kendoka up to ni-dan (2), but is very useful for all kendo students.
Suburito are bokken designed for use in suburi. Suburi, literally "bare swinging," are solo cutting exercises. Suburito are thicker and heavier than normal bokken and users of suburito have to develop both strength and technique. Their weight makes them unsuitable for paired practice or kata.
The All Japan Kendo Federation specify the dimensions of bokken for use in kendo kata.
Additionally, various koryu (traditional Japanese martial arts) have their own distinct styles of bokken which can vary slightly in length, tip shape, or in whether or not a tsuba (hilt guard) is added.
Superior woods, such as American white oak, also known as Kashi (not to be confused with Japanese white oak, known as Shiro Kashi, which is an evergreen species and lacks the weaker spring growth rings of the American oaks), has been a proven staple, having a tighter grain than red oak wood. Another choice, hickory wood, seems to have a very good blend of hardness and impact resistance, while still having a relatively low cost.
The use of exotic hardwoods is not unusual when looking at some of the more expensive bokken. Some are made from Brazilian cherrywood (Jatoba), others from purpleheart, and some very expensive ones made from lignum vitae. Tropical woods are often quite heavy, a feature often sought in bokken despite the brittleness of these heavy and hard materials. Many of the exotics are suitable for suburi (solo practice), but not for paired practice where there is hard contact with other bokken.
Some online retailers offer bokken constructed from polypropelene plastics. The exact applications and benefits of such a weapon vary depending upon the user.
In Hiroyuki Takei's manga Shaman King, Ryu possesses a wooden sword.
In Hideaki Sorachi's comedic manga series Gintama, the main character Gintoki Sakata wields a bokuto bearing the kanji characters for Lake Toya on the hilt. Throughout the series, Gintoki maintains he was given the bokuto by a hermit while on a school trip to Lake Toya, but it is later revealed he purchased it on a home shopping channel. The sword is made of an alien wood, giving it superior strength, with it being able to break through wood, metal and other materials a regular bokuto would shatter against. In chapter 150 of the manga, it is revealed that the bokuto has a sword spirit much like Soul Reaper's in the manga series Bleach. Gintoki's sword spirit is a direct parody of Zangetsu, Ichigo Kurosaki's sword spirit.
In the science fiction series Stargate Atlantis, Ronon Dex and other Atlantis expedition members use bokken for practice and sparring. However, the form practiced is not Japanese. Instead, the style employed by Ronon Dex and others is somewhat free-form, possibly based on a martial arts form in the fictional Pegasus galaxy. The bokken is more often held with one hand rather than two (in contrast with the characteristic two-handed Japanese style).