Opening the Ro

Opening the Ro

Diagram of the yo-jō-han cha-shitsu, 四畳半茶室, four-mat-half tea-room, showing the lunar months and guardian Buddhist deities. Of special interest is the northwest corner and its associations with A-mi-da Nyo-rai, 阿弥陀如来, Praise-increase-steep Like-become, and Kan-non Bo-satsu, 観音菩薩, See-sound Grass-buddha, and the ro. The A-mi-da-dō gama, 阿弥陀堂釜, Amida-hall kettle, was one of Rikyū’s favorites. The influences of the eight Buddhist deities radiate from the center of the room and divide the space into eight sections. 

The signs of the Amida and Kannon join within the half-tatami that is identified with Amida, so that the influence of Kannon in the 11th month is foreshadowed in the 10th month. The ro, 炉, hearth, is covered over during the fu-ro, 風炉, wind-hearth, warm season which ends on the first Boar day of the 10th lunar month, which corresponds to early November. In the diagram, the ro is protected for the most part by Amida’s influence, however, Kannon’s influence covers a part of the ro.

In Japan, in the 10th month, Shintō deities leave their shrines throughout the country, and assemble at Izumo Tai-sha, 出雲大社, Out-cloud Great-shrine. Buddhist deities stay in their temples, and in Chanoyu, the furo is set in the middle of the tatami, and may have Buddhist influences. Ro-biraki, 炉開, hearth-open, occurs on the first I no Hi, 亥の日, Boar ’s Day, of the 11th month, November. Amida is the Buddhist guardian of the sign of the Boar. The following day is a Ne no Hi, 子の日, Rat’s Day, which has Kannon Bosatsu as its Buddhist guardian. Kannon is embodiment of the mercy of Amida, and is a male deity in female form. She has not entered the ultimate paradise so that she can help guide souls to Amida’s western paradise of do, 浄土, Pure-land. 

The return of Shintō deities on the Day of the Rat, or rather day of Kannon, may to a westerner evoke feelings of Halloween on the last day of October, and All Saints Day on the first day of November. Halloween is also called All Hallows Eve. It is believed that the festival began around 609 in Christian harvest celebrations. Robiraki is the time when the year’s ‘new’ tea is served, along with newly harvested rice and beans. Opening the ro on a Boar day, may be seen as an ‘eve’ of the Rat day, but especially dedicated to Kannon.


Cha-tsubo, 茶壺, tea-jar, stoneware jar with rounded shoulder, Shiga-raki yaki, 信楽焼, Faith-pleasure fired; H. one shaku kujira-jaku. With fabric cover and rope knot.

Opening the tea leaf storage jar, cha-tsubo, 茶壺, tea-jar, is to get the ‘new’ tea, and grind it to serve at the robiraki. Opening the chatsubo is called kuchi-kiri, 口切り, mouth-cut, from cutting the paper seal around the mouth of the jar. Customarily, the charcoal to build the fire in the ro is held in a dried, natural spherical gourd called a fukube, 瓠, Lagenaria siceraria. It is interesting to note the fukube gourd is related to the Halloween pumpkin. The gourd holds the charcoal to make a fire, and the pumpkin holds a burning candle.

From left: fukube sumi-tori, 瓠炭斗, gourd charcoal-measure, diam. one shaku kane-jaku. Right: carved and lit Halloween pumpkin.