Icebreaking research vessel
MOL is to deploy an outfitting crew to the shipyard building Japan’s first icebreaking research vessel

Marine Log reports,

JAMSTEC (Japan Agency for Marine-Earth Science and Technology) has taken another step forward on the build of Japan’s first research vessel with icebreaking capabilities. The icebreaking research ship is on order at Japan Marine United’s Isogo shipyard in Yokohama where, as of last month, the design of the hull structure was nearing completion…The LNG dual-fueled Polar Class 4 ship will have a total length of 128 meters, a width of 23 meters, an international gross tonnage of about 13,000 tons, and a crew of 99 people. It will be to break sea ice with a thickness of 1.2 meters at a speed of 3 knots, and will be equipped with drones, unmanned probes, and Doppler radars used for weather observations.

That is 420 feet in length and 75’5” in beam. USCGC Healy is the same length, but 82′ (25 meters) in beam, and 16,000 tons, so they are pretty close. If I interpreted correctly, this would be considered at the low end of the medium icebreaker class by the USCG. Like Healy, this ship uses shaft driven propellers.

There are diagrams of the ship here.