Idea 1: Bushido Discipline: all Japanese units get +20.00% discipline and +10.00% Morale along with 8 base shock
Idea 2: Shogunate: Nippom gets +30.00% Manpower Recovery Speed and -2.00 War Exhaustion Monthly
Idea 3: Zaibutsu: Japan gets +25.07% Global Trade Power
Idea 4: Shintu Syncretism: Japan gets +6.00 Tolerance of Heretics and Heathens and Shinto provinces can't be converted
Idea 5: Zen: Japan gets -45.00% stability cost and westernization is cut in half.
Now that seems much more representative of the "Prussia of The East" don't you think? :3
The following is from assumption of infinitude of human stupidity:
The Prussia of the East got REKT in the invasion of Korea.
20% Discipline is cancerously obscene
-2 WE monthly... lmao
+25% global trade is tolerable, if only because Ming will still eat it before 1750.
+6 tolerance... WOLOLOL (spot the reference

)
-45% stability cost and half westernization... you should consider cutting your brain in half, it might boost the functionality.
Ming horde would swarm your samurai in seconds, and Chinese armour and weapons annihilates Japanese in quality too until the Qing barbarians took over.
Now, let's assume no infinitude of stupidity and reply with Ming buffs:
Traditions: Legacy of Zheng He--He taught us that a vast fleet can sail forth into the unknown and return safety. Why then can a colony overseas not be supplied and sustained with a smaller number of such expeditions? +200 colonization range, +400 naval supply range, +50 colony growth, +1 Colonist
Idea 1: Shen Ji Ying--Known to Westerners as the Divine Engine Division, the Shen Ji Ying is dedicated to the use of firearms and their integration into combined-arms combat. +1 fire pip on all units, +1 shock pip on artillery, +2 fire pips on all generals
Idea 2: Cultural Momentum--By flooding a region with our settlers we can easily change the culture of the local populace to whatever we wish, and via our enormous numbers we can resist foreign attempts to assimilate us. -60% culture change cost on owned lands, +100% cost and time for other nations to try to convert Chinese cultural union to any other culture.
Idea 3: Standardized Firearms--Via mass production of our guns, we have managed to standardize our weapons so that each soldier knows he can pick up another's gun and continue fighting with the same performance. +10% Land Morale, +5% Discipline, +10% Fire damage for all units.
Idea 4: Institutionalized Officer Schools--Our officers are many, but to raise new ones for the lower ranks often ends up being arbitrary. Promoting official schools for the art of war will allow us to have more field marshals at any one time as well as improving the discipline and morale of our soldiers. +10% Land and Naval Morale, +10% Discipline, +2 Leader Limit
Idea 5: Reformed National Draft System--Since time immemorial Chinese drafting practice has been one man per household in provinces close to the conflict zones. No longer! We shall now keep records of potential draftees within our nation and have each household's draftees registered in order of priority. This will allow us to muster, equip and train forces much easier during peacetime before deploying them to wherever trouble may brew. Manpower +15%, Manpower Recovery +5%, Recruitment Time -10%, Regiment Cost -5%.
Idea 6: Re-institution of Paper Banking--In the Song Dynasty the establishment of banking systems known now as Qian Zhuang and the widespread use of paper money led to a great deal of investment and trading, not to be seen again for centuries until the likes of letters of credit. It is time to bring it back to bring even greater glory to the Middle Kingdom. +20% Production, +20% Trade Power, +10% Tax Income.
Idea 7: This Land Is MING!--Due to the momentum of resettlement of our people, any territory we take that neighbors a province with a Chinese cultural union will be much easier to claim as part of our ancestral lands. -30% coring cost for any province neighbouring a Chinese cultural union, by land border or by shared sea zone. +500 colony growth when neighbouring a controlled (or subject-controlled) core territory of the Chinese cultural union.
Ambitions: The Shores of Tomorrow--Many millions of young men and women, seeking to own a plot of land of their own and get jobs of their own, to start their own families, have now been incorporated into our efforts to expand into new, unclaimed territory. Our training of colonization leadership has been similarly fruitful, and now may the world tremble as the Chinese people cover the Earth and subdue it! +500 colony growth, +5 colonists.