Tenken is the fighting style used by Sōjirō, formed of the Kanji ten (meaning divine, heaven) and ken, meaning sword. Apparently granted as a title from his mentor and idol Shishio, it is named such because his talent with the sword is great enough that it seems to have simply been yielded from heaven to Earth. Sojiro's most distinctive feature is his ability to use Shukuchi, a famed and illustrious martial art which allows him to move fast enough that no human eye could detect his movement. It is not explained what gave him such unbelivable speed, but it could at least be somewhat attributed to the grunt work he did as a child (having carried many dozens of sacks of rice, which possibly strengthened legs). This is made even more deadly by his ability to completely mask his emotions, which