German para-athlete Markus Rehm, better known as the "Blade Jumper," clinched gold at the Tokyo Paralympics on Wednesday but fell short of his own long jump world record.

The 33-year-old set a new T64 record in June of 8.62-meter, which would have won him gold at every Olympics since 1992, and set his sights on breaking it again in Tokyo.

A leap of 8.18 was his best effort on a cool and drizzly evening, but it was more than enough to give him his third straight title and a fourth Paralympic gold overall.

Rehm said he was happy with the gold but disappointed he could not jump further.

"It was in my mind, definitely," he said of the record.

"I aimed for a bit longer jump but that's how it is. The goal was to win the gold medal, and maybe we can attack the 8.62 another time."

Rehm had wanted to compete at the Tokyo Olympics this summer and said he had still not received an explanation why he could not.

"It is OK to make the decision that I can't compete but to make a decision without telling me why is just a shame," he said.

Ahead of Rehm's appearance, Tunisian Raoua Tlili took her second gold of the Games with a world-record discus throw in the F41 final, beaming and jumping with delight at the result.

There was controversy elsewhere though, with International Paralympic Committee spokesman Craig Spence condemning what he described as a wave of social media abuse after a Malaysian shot putter was disqualified and missed out on a gold medal for failing to appear on time.

Muhammad Ziyad Zolkefli was allowed to compete in the F20 final on Tuesday night despite being late to the call room.

He finished first, breaking the world record and winning gold. But afterward, a referee and jury both determined he had no good reason for being late.

Zolkefli and two other athletes were late, with Spence saying they argued they had not heard the announcement to gather or that it was in a language they did not understand.

"But all the other athletes were on time," Spence said.

The gold went instead to Ukraine's Maksym Koval, who Spence said was now "getting a lot of abuse from Malaysians."

"People say the Ukrainian stole the gold. No, absolutely not. The Ukrainian had nothing to do with it. It was the athletes that were late," Spence said.

'Makes it all worth it'

On the eighth day of the competition in Tokyo, 43 gold medals were up for grabs.

Tokyo's first gold in boccia, a sport similar to boules, designed for athletes with neurological impairments that impact motor function, went to Adam Peska of the Czech Republic.

And 90 qualified badminton players were gearing up for play as their sport made its Paralympics debut, with France's double world champion Lucas Mazur facing a challenge from India's Tarun Dhillon in the men's SL4.

Taekwondo, the other new sport at this Games, kicks off on Thursday.

With almost all spectators banned from the Paralympics over coronavirus fears, there have been few opportunities for athletes to interact with the Japanese public.

But U.S. high jumper Sam Grewe, who won gold in the T63 on Tuesday, shared online a letter handed to him by a Tokyo 2020 employee, who described the athlete's impact on his family.

Grewe's leg was amputated after he was diagnosed with a cancerous tumor in his knee as a teenager, and in his letter, Masaki Kando said his 13-year-son had also been diagnosed with a tumor on his knee and undergone a treatment known as rotationplasty.

"I was very anxious," Kando admitted about his son's treatment, saying his family had learned about Grewe on social media.

"High Jump the World Champion! You gave us great courage to my family. We are grateful to you."

Grewe, who is training to be a doctor to increase the representation of people with disabilities in medicine, said of the letter: "Win or lose, this is what it's all about."

"This makes it all worth it," he added on his Twitter account.