Diniz's mark is so recent that it has not yet even been ratified, but Suzuki improved it by 26 seconds, winning at the IAAF Race Walking Challenge meeting in 1:16:36.
Suzuki had started the year by finishing second at his national championships, watching compatriot Eiki Takahashi break Suzuki's national record.
With that as motivation, Suzuki – who is renowned for setting off at a fast pace – went out quicker than he ever had done before, passing 6km in 22:53.
He covered 8km in 30:25 and went through the half-way mark in a national 10km record of 38:05. It was clear that he was on course for a fast time if he were to maintain that pace, but that had often been his downfall in the past.
He finished well clear of his rivals, smashing Diniz's mark of 1:17:02 set at the recent French Race Walking Championships in Arles.
This is Suzuki's third Asian title, having won in 2010 and 2013.
More to follow.
*Subject to the usual ratification procedures