Apparently, this game can be had for free via Xbox Live Gold Japan.
You need to log in and then the game should be free.
Also, apparently no VPN is required to do this, you just need to stay in the Japanese store.
I cannot verify it myself so if it does not work, please let me know in the comments.
DLC is also free: https://www.microsoft.com/ja-jp/p/tobys-dream-dlc/c1t3l9fkj4...