Should I disclose my mental health disorder to japanese schools?

I don’t know if this is the right subreddit to post this, but I’m thinking of going to Japan next year and spending 6 months there studying japanese, and I’m worried about schools not accepting me because of my bipolar disorder type 2 diagnosis.

I’ve talked to someone from Go Go Nihon and they told me I needed to disclose my diagnosis to the schools and have them interview me to see if they’d accept me. I’m really afraid of the stigma around bipolar disorder being so bad, the schools wouldn’t even consider having me.

My question is, is there any way of me not mentioning my diagnosis to the schools? I only mentioned it to the Go Go Nihon person because I needed information on bringing in medication and now I feel like the whole thing is doomed to fail.