[1] Moriyama won the HRS Suzuka School Scholarship, with that he got a full time seat in the F4 Japanese Championship for 2023 with Honda Formula Dream Project.

He was paired with the 2022 runners up Yusuke Mitsui, and French F4 Championship driver Yuto Nomura.

In that year as well, Moriyama competed in Super Taikyu ST-TCR class with M&K Racing for two rounds alongside Mitsuhiro Endo & Shinji Nakano.

[3] For 2024, Moriyama continued to race in F4 Japan, as he moved to HELM Motorsports.

Moriyama was picked by the JAF, and Super GT to compete in the 2024 FIA Motorsport Games Formula 4 Cup.