Does anyone know where you can purchase Hong Kong Stock Exchange or Shenzhen Stock Exchange stocks within Japan?

Specifically for the Hong Kong Stock Exchange, I'm looking for odd lots rather than the full stocks, which are often in multipliers of 100 or more.

I tried Moomoo thinking they would have Hong Kong stocks but after opening an account I realised it's not possible.

Rakuten Securities has Hong Kong stocks but you have to purchase them in batches and not odd lots (confirmed, also have an account with them!)

I know ETFs are an option but I'm looking to directly invest in particular stocks.

Would appreciate any information or advice. Thank you!