Jiro first became familiar with Takuro and the rest of GLAY as they attended another high school in the same town, and were mutually involved in the local indie scene.

He states that during this time he owned nothing other than what he had carried in his backpack when traveling from Hakodate, and had walked part of the journey to save money.

At first he declined due to his doubts about a stable career in music but as Takuro insisted, he agreed to play one concert with them.

When asked his name after one of his early gigs with the band, he was reluctant to reveal his given name which he felt was "uncool" and spontaneously chose the pseudonym "Jiro" which he continued to use as a stage name and nickname from that point onward.

He wrote a regular column, "Caramel Box", for the magazine What's In and continues to host a radio show called "Buggy Crash Night" on Funky802 FM.