Hello~ As the title says, I'm looking for kingdom/territory building novels. So far I've only found these decent ones, Genjitsushugisha no Oukokukaizouki Spoiler: Description In a world where the Demon King had taken over a fifth of the land. Souma Kazuya (Soma) was summoned to that world as a hero, but the king took a liking to his rich country strong army proposal and somehow handed him the throne. Soma, who had the throne forced upon him, forewent adventure, and together with the talented companions he gathered, went about his nation-building with his realism. Tales of the Reincarnated Lord Spoiler: Description After his consciousness transcended worlds and entered the body of an exiled noble youth, summons arrived for him ten years later to return and succeed the title of the Lord. Faced with a desolate dominion, uneducated common folk, treacherous nobles as well as the current Lord Duke, how will he cope and thrive? Common Sense of a Duke''s Daughter Spoiler: Description I Was Reincarnated as the villain character of an otome game, the daughter of a Duke. However, when I regained my memory, I had already reached my “ending.” My engagement had been cancelled and if things goes according to its “course,” it was set that I will be imprisoned by the church. Where is my bright future? The ones that I've mentioned above really focus on territory management. They make use of their previous-life knowledge and apply into territory management. It's hard to find these type of novels. Some novels do have the tag "Kingdom Management" but never really focus on management. They focus on fighting rather than management. If you do have some, please recommend to me. And I will check it out ☺
Great Tang Idyll is also good http://www.novelupdates.com/series/great-tang-idyll/ And takarakuji http://www.novelupdates.com/series/takarakuji-de-40-oku-atattandakedo-isekai-ni-ijuu-suru/
Release that Witch - definite must. My Ranch - not exactly what you're looking for but if you enjoyed RTW, I'm sure you'll enjoy this.
All the ones I would have recommended already are so I will recommend English novels. The Spellmonger Series by Terry Mancour (From book three onward it is focused on territory management.) The Daniel Black books by William E Brown. The Chaos Seeds by Aleron Kong.