Toshikazu Kawaguchi was born in Osaka, Japan, in 1971. He formerly produced, directed and wrote for the theatrical group Sonic Snail. As a playwright, his works include COUPLE, Sunset Song and Family Time.

The novel Before the coffee gets cold is adapted from a 1110 Productions play by Kawaguchi, which won the 10th Suginami Drama Festival grand prize. It was followed by Tales from the cafe, Before your memory fades and Before we say goodbye.