A couple of checks... is the yamada.gltf model accessible? Check the Network tab of your browser to see if the model is actually retrieved or does it generate a 404 error?

Then, if it is accessible, try using a hiro preset to see if the marker can be used to display the yamada model.

TLDR; check for availability of model and then scale/position of model. Then it is mainly due to GPS coordinates. Remember that GPS coordinates need to be more precise. A 0.5 change can put you miles away.