Tokyo Marathon Charity Entry

I'd LOVE to run the Tokyo Marathon in 2026 as my 4th WMM star. Charity entry opened today but the process is super confusing and much different than other WMM charity applications. 

If you've run Tokyo through a charity entry do you have any tips? Are there certain charities that accept more US citizens than others, and how far above the minimum donation should I be bidding to secure a spot?