In the Men's Elite race it will be Brit and Derby born Tom Bishop's last chance to stake a claim on the third British slot in Rio. We will be rooting for our man Henri Schoeman to exit the water first.
The Women's Elite race will see Mari Rabie, Aileen Reid (pictured below) and Erin Jones looking to improve their world series rankings.
Our HUUB Japan athletes include Jyunpei Furuya and Kohei Tsubaki in the Elite Men's and Yukako Hata in the Para-triathlete race.
We'll hopefully be reporting on the race through the eyes of Harry Wiltshire sometime next week but he is racing an Ironman whilst the ITU action unfolds. Apologies in advance for any delay with the write up!
An exclusive offer for you from Ekoï
By cutting out the intermediaries and providing cyclists and triathletes with quality products at highly-competitive prices for 15 years, Ekoï are one of the major companies in the European bike industry.
They are at the forefront of innovation and worn by numerous athletes who trust them. Among those are Alistair & Jonathan Brownlee.
Although the brothers are not racing in Yokohama this weekend, we have partnered up with their helmet sponsor Ekoï to offer you an exclusive 15% discount online.
Simply enter the code GB20 at the checkout against anything on the Ekoï website including cycling helmets, sunglasses, clothing and shoes.
Hurry though as you only have until this 15th June to take advantage of this fantastic offer!