The father of a 17-year-old boy killed a year ago in a collision between two subway trains in Tokyo's Meguro Ward received a graduation certificate in his son's name on Wednesday from the high school the boy attended.

Kunihiko Tomihisa, 54, father of Shinsuke Tomihisa, attended the graduation ceremony at Azabu High School in Minato Ward and was handed a certificate for his son.

Today is the first anniversary of the accident, in which a Hibiya Line train traveling above ground derailed and collided with an oncoming train. Five passengers, including the boy, were killed and 64 others were injured.

Shinsuke was a member of the school's soccer and rugby clubs. He also regularly attended the Ohashi Boxing Gym in Yokohama.

Gym owner Hideyuki Ohashi, a former two-time world champion, lamented the boy's death as "a great loss to the country."

From this year, Ohashi will run the Tomihisa Cup tournament of professional boxing matches in memory of Shinsuke.

The high school also gave a graduation certificate to the parents of another student who died in an unrelated accident.

The two students' names have been removed from the school list, but Takao Negishi, principal of the high school, decided to grant the certificates to the parents at the request of other students who said they had hoped to graduate together with their friends.

The March 8 accident occurred just after 9 a.m., about 100 meters northeast of Nakameguro Station on the Hibiya Line, operated by the Teito Rapid Transit Authority.

It was the first major accident for Teito in its nearly 70 years of operation and the first one involving passenger fatalities.

Other victims were Tomomi Yamazaki, 29, a businesswoman from Yokohama; Yasuyo Maki, 37, an employee of Kagoshima-based newspaper Minami Nihon Shimbun; Shinya Fujii, 33, official of the Patent Office; and Yoko Yokoyama, a company employee from Meguro Ward.