Wooden Sword

The wooden sword, or bokken, is a katana made of wood that is primarily used in kendo. Before recieving the Murata-tou, Saeko Busujima uses her personal wooden sword in combat. It is a special sword with ties to the Busujima Clan and the Yamato Dynasty.

Overview
"The mysteries of the Yamato Dynasty and the Japanese people are sealed within this sword. The Busujima Clan, descendants of a family that has protected the throne since ancient times, have transcended time and space to continue protecting those secrets. This has nothing to do with the story of 'Highschool of the Dead', though.-Daisuke Sato  The wooden sword is a blunt weapon shaped like a katana. It is made out of wood, and therefore, is less effective than a real katana, however, with enough power, it is capable of fracturing the human skull.

Plot
The Bokken was owned by Saeko Busujima for an unknown period of time. She uses the bokken to fend off infected in the school. Afterwards, she kills a bitten student with the bokken. After she kills the student, she uses it at Rika's house and in front of Saya's house. Afterwards, she gets a real katana and leaves her bokken behind.