M.O.R.P.

Japanese: MORP

...An international organization for proletarian literature was the International Bureau of Proletkrit, which was established in 1920 and reorganized as the International Bureau of Revolutionary Literature in 1925. At the bureau's second conference held in Kharkov in 1930, bringing together proletarian writers from 22 countries, the organization was renamed the International Union of Revolutionary Writers (Mezhdunarodnoe ob'edinenie revolyutsionnykh pisatelei) and played a major role in international exchange of proletarian and revolutionary literature until its dissolution in 1935. [Egawa Taku]
[Japan]
Japanese proletarian literature gradually began to attract attention from the beginning of the 1920s, and by 1930 it had become so vibrant that it overwhelmed the literary world. After the Manchurian Incident in 1931, however, it began to disintegrate due to intensifying repression, and disappeared in its entirety around 1935. It encompasses a wide range of works, from simple expressions of the lives and voices of workers and apprentices to literary activities that were part of the revolutionary movement led by the Communist Party.

From [Proletarian Literature]

...An international organization for proletarian literature was the International Bureau of Proletkrit, which was established in 1920 and reorganized as the International Bureau of Revolutionary Literature in 1925. At the bureau's second conference held in Kharkov in 1930, bringing together proletarian writers from 22 countries, the organization was renamed the International Union of Revolutionary Writers (Mezhdunarodnoe ob'edinenie revolyutsionnykh pisatelei) and played a major role in international exchange of proletarian and revolutionary literature until its dissolution in 1935. [Egawa Taku]
[Japan]
Japanese proletarian literature gradually attracted attention from the beginning of the 1920s, and by 1930 it had overwhelmed the literary world. After the Manchurian Incident in 1931, it began to disintegrate due to intensifying repression, and disappeared in its entirety around 1935. It encompasses a wide range of works, from simple expressions of the lives and voices of workers and apprentices to literary activities that were part of the revolutionary movement led by the Communist Party.

*Some of the terminology that mentions "MORP" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…　プロレタリア文学の国際的な組織としては，1920年に設けられたプロレトクリト国際ビューローがあり，25年にそれが革命文学国際ビューローに改組される。30年，22ヵ国のプロレタリア作家を集めてハリコフで開かれた同ビューローの第2回大会で，組織は革命作家国際連合Mezhdunarodnoe ob’edinenie revolyutsionnykh pisatelei(MORP（モルプ）)と改称され，以後35年に解散となるまで，プロレタリア･革命文学の国際交流に大きな役割を果たした。【江川卓】
［日本］
　日本のプロレタリア文学は，1920年代の初めからしだいに注目され，30年ころには文壇を圧する活気を示し，31年の満州事変以後は弾圧激化で解体に向かい，35年前後にその形としては消滅したもので，労働者や下積みの人々の生活とその声の素朴な表現から，共産党主導の革命運動の一翼としての文学活動という面までを包含する。…