Editing Rising Sons (section)

===Sub-sector Yamato===
Small, by sub-sector standards, Sub-sector Yamato is governed by the Rising Sons and is located in the Ultima Segmentum, bordering the Eastern Fringe. It hosts a number of closely grouped star systems. Notable planets are as follows:

;Sekai
:Capital of Sub-sector Yamato.
:Medieval tech level.
:Classic Sengoku age Japan on a worldwide scale.
:A densely populated feudal world, where warring clans forever battle for honor and prestige. The Shogun resides here at the planetary capitol. The Rising Sons will often send representatives to view especially important battles and scout for potential space marines. 

;Kyotoro
:Heavily industrialized, not hive or forge world, however.
:Produces most of the chapters wargear.
:All major areas are controlled by the Forge-Clans.
:Every 4 years, the various Forges "Bid" for the honor of producing the chapter's wargear through a period of intense conflict between them. The forge that captures the most territory is deemed to have constructed the best quality equipment and is thus awarded the contract. Techmarines are usually from here.

;Otera
:Shrine world.
:The spiritual home of the chapter.
:Home to several cults that interpret the Emperor in different ways.
:Warfare is usually considered a "Holy War". Guns are frowned upon by some sects and embraced by others. To avoid undue damage to the shrines and temples, the wars generally consist of duels between champions or take place far away from the cities. The sites of the major battles tend to result in the foundation of a new shrine on that spot by the winning side, with the usual end being that the losing side's temple falls to pieces and eventually returns to being part of the landscape. This results in an eternal cycle of shrines being built and falling to pieces.

;Tojo (Destroyed)
:Primary Source of Ashigaru regiments.
:A highly militaristic world, Tojo was home to the fatalistic Ashigaru Imperial Guard regiments that often accompanied the Rising Sons. They were renowned for their uncannily high morale and willingness to utilize suicide tactics at a moment’s notice. Bayonet charges into heavy fire were practically a trademark of the Ashigaru. The pilots within Battlefleet Yamato are also known to display this fatalistic attribute, often loading their small fighters with explosives and intentionally plunging them into enemy battleships. Tojo was destroyed by a Necron attack, the ancient warriors wiping out all organic life on the planet. Soon after, the world was declared [[exterminatus]] and destroyed at the order of Inquisitor Octavianus, fearful that the Necron could use the dead planet as a staging point for further attacks on the Yamato sub-sector.

;Tengu
:Feral Death World.
:Primary Recruiting world of the Rising Sons.
:It spends much of its time eclipsed by another planet, causing it to have long periods of twilight and nighttime. Every couple of months, the planet slips out of eclipse and is blasted by harsh heat from the sun. The human population often seeks shelter in the planet's vast and thick forests, but the during this period, forest fires are also frequent. During the eclipse period, the human population is constantly on the run and hiding from Tengu's variety of dangerous creatures. To survive, Tenguese learn to be extremely adept at stealth and hunting. Many of the Rising Sons' ninja scouts are recruited from here, as well as Ashigaru Stormtroopers, known as the Tengu.

Interestingly, a Yamato system already exists in canon fluff, as mentioned by the Black Library short story collection 'Fear the Alien', in which the Iron Inferno story takes place on the planet Izanagi in the Yamato system which eventually falls to an Ork Waaagh! (With no sign of space marine intervention of any kind whatsoever.) How this enormous GW BITCHSMACK will affect the current Rising Sons fluff, only time can tell.