Toshimasa Azuma

Toshimasa Azuma (我妻 寿正, Azuma Toshimasa) is the grandfather of Jiro Azuma and a retired ninja from the Bureau of Espionage, but was forced to return to active duty.

Afterwards
The Azuma family has been a family of onmitsu for generations. As the family heir, Toshimasa of course became an onmitsu himself, battling against the criminal rabble operating in the shadows during Japan's economic boom years. He met and married a young woman, and together they had a daughter. This girl would later go on to become Jiro's mother.

Toshimasa's wife passed away of illness while their daughter was in high school. He had no intent to remarry and, for his late wife's sake, he didn't want to force his daughter into becoming an onmitsu, either. Thus he decided that he would be the last Azuma onmitsu. It is for this reason that he stubbornly opposed Jiro becoming an onmitsu.

But one day his daughter came home pregnant by a man he didn't even know, and to top it off she passed away in childbirth. This drove Toshimasa over the edge. He pulled in favors at the Bureau, using their information network for his personal hunt. He even resorted to illegal methods, but in the end he was unable to track down Jiro's father.

While he was serching, Jiro grew into a healthy ,energetic young boy. The passage of time and watching Jiro get bigger and bigger helped cool Toshimasa's temper. Eventually he decided to spend the rest of his days raising his grandson, and he retired from the Bureau.

After the Amagi Incident, he returned to active duty as a special advisor at the Bureau, training new recruits and the regular foot soldiers.

Later, certain events would set Jiro on the path to finding his father, but as Toshimasa wasn't present he would not learn of this until much, much later...