Hello Ryan.
Thanks for your commnet.
I’d recommend Nikkei and Nomukomu for the market data.
They make great reports.
https://nrm.nikkei.co.jp/
https://www.nomu.com/english/report/
For the process of buying a property,I’d like to recommend the blog, written by my friend Lily who is also a RE/MAX agent (in Osaka).
In her blog, she explains a simple but very good way for overseas people to buy a property in Japan.
https://remax-l-style.com/buying-property-in-japan-as-an-overseas-buyer-a-comprehensive-guide/
https://remax-l-style.com/buying-property-in-japan-as-an-overseas-buyer-a-
comprehensive-guide-a-guide-to-remote-contract-signing-and-closing/
For selling, I think the link below will help.
https://www.realestate-tokyo.com/sell/selling-guide-1/
Hope these information help you!