Daijiro Kato

Kato was born in Saitama, and started racing miniature bikes at an early age, becoming a four-time national champion in the Japanese pocket-bike championship. He began road racing in 1992 and entered his first Grand Prix in 1996 as a wild-card rider, finishing third in the 250cc class at his home circuit of Suzuka Circuit. The following year he won the Japanese Championship and again entered the Japanese Grand Prix as a wild card, winning the race on that occasion.

Kato did not ride his first full Grand Prix season until 2000, when he started in the 250cc class riding a Honda, won four races, and placed third in the championship. In 2001 he dominated the 250cc championship, winning no fewer than 11 races — a record in the 250cc class that still stood after the class became Moto2. He also set a new record for the most points in a single 250cc season with 322 points.

The following season, Kato moved up to the MotoGP class, racing for Honda Racing Corporation (HRC) in the Fortuna Gresini Racing team. Strong performances on the Honda NSR500 two-stroke bike in the first half of the season — including second place at the 2002 Spanish motorcycle Grand Prix at Jerez — earned him a full factory-supported four-stroke Honda RC211V for the remainder of the season; his best result on that machine was second place at the Czech Grand Prix at Brno. He also took pole at his home race at Twin Ring Motegi.

For 2003, Kato remained at the Gresini Racing team, now with sponsorship from Telefónica Movistar brought by new teammate Sete Gibernau joining from Suzuki.

On 6 April 2003, during the first race of the MotoGP season at the Japanese Grand Prix held at Suzuka Circuit, Kato crashed and sustained severe head, neck, and chest injuries. He struck the wall near the Casio Triangle chicane at around 125 mph (200 km/h). The Accident Investigation Committee determined that Kato crashed when he lost control of his motorcycle, which entered a near high-side state followed by an uncontrollable oscillating weave, causing him to leave the track and strike the barrier. He was severely injured when his head struck the edge of the foam barrier, dislocating the joint between the base of the skull and the cervical spine.

Questions were raised regarding the actions of the corner workers immediately after the crash. Kato was thrown back onto the track and was lying next to the racing line; the race was not stopped. The Investigation Committee noted: "According to images broadcast during the race, four rescue workers took hold of Kato, who lay collapsed face up in the middle of the course, held him by the right shoulder, the torso and both legs, and moved him sideways just a few dozen centimeters onto the stretcher. It certainly appears that sufficient care was taken to immobilize his head and neck area. However, when the stretcher was moved Kato's head drooped markedly, and it cannot be denied that this might have additionally injured his neck." Kato's crash was the first fatal accident to occur during a Grand Prix motorcycle racing session at Suzuka Circuit.

Kato spent two weeks in a coma before dying on 20 April 2003. The cause of death was listed as brain stem infarction. No Grand Prix motorcycle race has been held at Suzuka since, with safety issues at the facility cited as the reason.

Many MotoGP riders wore black armbands or placed small #74s on their leathers and bikes at the following race in South Africa. His teammate Sete Gibernau thereafter wore a #74 on his racing suit after winning the race in Kato's memory.

During the 2003 Suzuka 8 Hours held that July, Honda paid tribute to Kato by bearing his racing number on the Sakurai Honda bike of Tadayuki Okada and Chojun Kameya, along with the bikes of Nicky Hayden and Atsushi Watanabe. At the end of the race, the Sakurai bikes of Yukio Nukumi and Manabu Kamada went to the rostrum displaying Kato's helmet bearing his number on the visor and a photo of him on the bike.

The FIM subsequently retired Kato's number 74, which has not been used by any rider since, and named him a Grand Prix "Legend". Satoshi Motoyama, a fellow Japanese racer competing in Super GT and a childhood friend of Kato, carried Kato's racing number on his helmet from that point on.

A month after the crash, on 18 May 2003, Honda organised a memorial day attended by approximately 9,000 people, including his last team owner Fausto Gresini, at Honda's Aoyama building in Tokyo. In 2006, Misano World Circuit honoured Kato by naming a new access road to the circuit Via Daijiro Kato.

This article is based solely on the supplied corpus. No external sources were consulted; claims that could not be substantiated against the corpus were omitted under the drop-the-claim rule.