Japanese treaty acceptance and the Nagato class

Would the Imperial Japanese Navy have accepted a treaty deal that scrapped one Nagato-class ship and left Japan at a three-to-one disadvantage?

No. Japan would not accept the stated loss of a Nagato-class ship and the three-to-one disadvantage.

Japan would reject a treaty arrangement that scrapped one Nagato-class ship while leaving the Imperial Japanese Navy at a stated three-to-one disadvantage. The proposed bargain combines the loss of a modern capital ship with an unfavourable fleet ratio. The response treats those terms as beyond what Japan would accept. It does not explain what alternative ratio or compromise might have been negotiable.