In 2017, Jowash Saballero’s path in kendo began when he met Takeyasu Onose Sensei, a Roku-dan (6th Dan) from Ibaraki Prefecture, Japan. Onose Sensei, a frequent visitor to the Philippines through OISCA’s cultural exchange program, introduced kendo training at the SHISEIKAN Dojo. Drawn to the discipline and philosophy of Japanese swordsmanship, Jowash became one of his earliest students and, in 2018, founded the OISCA Negros Kendo Club under his mentor's guidance.

The Shiseikan Dojo stands as a beacon of traditional Japanese kendo in Negros, with its foundation deeply tied to the contributions of Onose Takeyasu Sensei, whose influence has shaped the kendo of Negros Island over the years.