Japan Railway Construction Transport and Technology Agency ’s (JRTT) A1 rating reflects the agency's very strong links with the Government of Japan (A1 stable).

JRTT's creditworthiness reflects that of the sovereign, given the strong alignment of its interests and objectives with those of the government's transportation policies; and the agency's very limited strategic or operational autonomy, as illustrated by the government's frequent and strong supervision, and requirement of approval for most of the agency's activities.