Daisugi
Daisugi (台杉) is a Japanese technique similar to coppicing, used on Cryptomeria (Sugi).
Shoots from a base are pruned so that the log stays straight.[1]
It is believed that the production of logs by daisugi began in the Muromachi period. At that time, it is said that tea ceremony became popular because daisugi logs were used in tea room construction, for example for the tokonoma alcove. The Kitayama area of Kyoto became especially known for its forestry of daisugi.[2][3]
This technique allows for harvesting of straight logs without having to cut down the entire tree.[4]