OP is part of a party of 4 (two adults and two minors).
It’s possible that those in the group with a wheat allergy/intolerance are different from those in the group with soy allergy.
I do hope susanita3333 is approaching an organisation who can help with interpreting/translation help. If there isn’t a volunteer available, hiring a professional for at least half a day may be necessary. Might need to forsake a taxi from NRT to afford such a service though.
I’ve seen a LOT of requests in this forum over the past decade or so. What susanita3333 is asking I consider perhaps the most difficult of all to fulfill. I’m pretty sure I’ve never suggested that securing the services of a guide was an essential component in visiting Japan before.