The YSS Kaiyo II, NG-X1-501, is a Fuji-class Expeditionary Gunship built at Gemini Star Fortress in mid-YE 39 by Ketsurui Fleet Yards for the Star Army of Yamatai's First Expeditionary Fleet. The ship subsequently became part of the First Fleet in YE 41 and is now assigned to Task Force 282 as its flagship. She is commanded by Taisa Taiyou Hoshi. The ship is named after the retired YSS Kaiyō and was the second ship of her class to be built. She was the sole ship on the Kuvexian frontline for years until the war's end. She operates clandestinely currently.

This article is about the ship. For plot information, see Kaiyō.

The YSS Kaiyō II attempts to dismantle the Kuvexians in their own space by venturing far from the Kikyo sector in hopes of finding their weaknesses and exploiting them. The command intends to succeed where the YSS Kaiyo failed.

The Fuji-class is a large gunship with speed, agility, and durability in mind and boasts a strong weapon array. This ship was built with comfort for VIP guests and officers in mind while giving extended crew accommodations that its predecessor, the Plumeria-class (2D) Medium Gunship, was not equipped with. It also includes its own rooms solely for recreation, virtual reality or VR, meditation and introspection, as well as a comfortable monitoring room that doubles as a bridge should the primary one be compromised. The bridge on the Fuji is centrally located and well protected by the rest of the ship. Its shuttle and power armor bays are on the underside of the ship along with the wardroom, which allows those in the wardroom to view what the ship may be orbiting at the time. It has a medium sized custom eight-seater bridge. It is a high-performance ship based around the need for a multi-role vessel.

In Yamataigo Fuji translates to wisteria (富士).

NG-X1-501

Light in Darkness

Kaiyō means ocean and is named after the original YSS Kaiyo.

Kaiyō Kaiyō you are a shining star Kaiyō Kaiyō bringing us oh so far A ship to brave the storms of space A ship to stave off any disgrace Kaiyō Kaiyō set your sights distantly Kaiyō Kaiyō crush opponents abysmally A ship to take on any force A ship to set its own course Kaiyō Kaiyō an ocean of wonderment Kaiyō Kaiyō you are a raging torrent Waves crash from your mighty hull Your crew takes on duties in full Kaiyō Kaiyō you are a shining star!