"I jumped out of the bathtub and raced into the streets, yelling, 'EUREKA! EUREKA! WE HAVE FOUND THE ANSWER!'"



this is quite excellent, goes along with some plans of mine.
So after this, Japan will become even more isolationist, right?
Okay, I can open up Korea fully by 1830. So it could accept all the Japanese merchants and materials of Westernisation (rubbing hands gleefully) good, all going according to plan...(evil cackle)

EDIT: on top of that, can we expect the Dutch being kicked out of Japan? Japan may be like, "they are the root of all evil and against Neo-Confucian ideals" and throw them away...
According to what I wrote, it would be the opposite and lead to earlier Meiji in Japan (westernization) and to more foreign exchanges.
I included Ogata Kōan in the revolt and this guy is well known for importing Western medical knowledge into Japan during Japan's isolationist era and for establishing the Tekijuku (適塾) school that later developed into Osaka University in 1938. Ogata used his small but precious collection of Dutch books, including a Dutch-Japanese dictionary and a Dutch encyclopedia, to teach his pupils to read scientific Dutch texts. He was one of the pillars of Westernization/Rangaku.
Among the alumni of Tekijuku you have :
- Fukuzawa Yukichi (Japanese Voltaire and political reformer. He published the first English-Japanese dictionary).
- Ōmura Masujirō (father of the modern japanese army).
- Ōtori Keisuke (Shogunate commander, historian and diplomat to China and Korea).
- Takeda Ayasaburō (military architect, navigator)
- Shōzan Sakuma (telegraph)
- Udagawa Yōan (chemistry)
- ...
- to have fun : look at Tanaka Hisashige (Japanese Edison)
By the way if you need four guys for dirty work for the Emperor or the Shogun, have a look at the Bakumatsu Shidai Hitokiri.
What's your aim ?
*looks who the OP is* Oh I see.
If your aim is to export the Westernization to Korea, simply have this revolt fail utterly. Normally the Shogunate would execute all revolters or crucify them, a solution is to exile all of them to Satsuma and later outside of Japan, but you won't be able to butterfly Admiral Perry and Meiji. You would need a earlier POD to modernize Korea through Japanese westernizers only.
BUT :
I have a stupid idea : Use the Tsushima Island like OTL Dejima in Nagasaki and have the foreigners who trade with Japan forced to stay there. Originally built in 1634 to house Portuguese traders, Dejima was used by the Dutch as a trading post from 1641 until 1853. So in 1634 or in 1641 or later, make sure that Japan tells the Gaijins that they can only trade with Japan from Tsushima Island (POD).
During the Bakufu (Shogunate), the foreign relations policy of Japan (or Sakoku) under which no foreigner could enter nor could any Japanese leave the country on penalty of death stated that the trade with Dutch and China was restricted in Nagasaki and that trade with Korea was to be made from Tsushima domain. Trade with the Ainus in Matsumae Domain and trade with the Ryukyu was limited to Satsuma Domain.
A very isolationist Shogun decides, in 1634 or 1641, that trade with Western countries (China, Europe and Korea) is now to be made in Tsushima Domain (and on Tsushima Island exclusively) in order to avoid the contact of foreigners with Japanese citizens (except the inhabitants of Tsushima). Tsushima Island is ideally situated between Korea and Japan and can become a major trade hub for Dutch traders to Japan AND to Korea.
Pusan (Korea) 50km- Tsushima - 50km Iki (Japan)
With a continuously isolationist Japan during the Bakufu (Shogunate), the Dutch will automatically switch to Korea (seeking profits) and propagate their western ideas there too. They could even directly build a trade port in Korea. If you can get one open-minded Korea (at least more open-minded than the Shogunate which is easy), you can surely get a Korean Meiji before Japanese Meiji of 1868, especially if you think that trade from Tsushima will create less direct western contact for Japanese population than trade from Nagasaki.
I just destroyed the pre-Commodore Perry Westernization of Japan. *will commit Seppuku*