The year 2023 had a lunar ‘leap’ month, urū-zuki, 閏月, intercalary-month, also read jun-getsu. There was a ‘leap’ 2nd month of 29 days, so that the lunar 3rd month began on April 20. The lunar 4th month began on May 20. Rikyū’s death on lunar 2nd month 29th day was in 1591, which had a ‘leap’ 2nd month, so that his actual day of death day coincided with April 21. The lunar 4th month is identified with the east southeast direction, and the Zodiac sign of Mi, 巳, Snake.    Left: the ro with the sukigi-gama resting on wooden blocks, (right): the furo with a kama supported...