[3] He entered the Leningrad Forestry Institute that year but was forced to return to Andijan in 1928 due to illness.

His earliest dramas include Kar quloq, Teng tengi bilan, Lolaxon, and Quyosh.

[9] In 1940, he wrote the musical Nurxon based on the like of honor killing victim Nurkhon Yuldashkhojayeva, showing her as a martyr of women's liberation.

[11][12] In the years leading up to World War II, Yashin wrote librettos for the first national operas in the Uzbek SSR, such as Boʻron[13] and Ulugʻ kanal.

[14] He continued to write plays during the war, which included Oʻlim bosqinchilarga (co-authored with Sobir Abdulla),[10] Davron ota (co-authored with Sobir Abdulla),[15] Farod va Shirin and Oftobxon, some of which were focused on themes relating to the struggles against the Nazi invaders to boost the morale of Soviet troops.

[17] He authored and co-authored numerous other plays with political and cultural themes including Ravshan va Zulxumor and Inqilob tongi.

[18][19][20] Yashin had been friends with the famous Uzbek writer Hamza Hakim-zade Niyazi, who was stoned to death in Shohimardon by religious fanatics in 1929 for alleged blasphemy.

[25][3] Another play by Hamza he reworked was Paranji sirlaridan bir lavha, which focused on the plight of women in pre-Soviet Uzbekistan.