Yohana was a student at the Africa Inland Mission (AIM) school in Bulima in the early 1950s.[8] His teachers were Tanzanian and originally taught in the Sukuma language.
Yohana alisoma katika shule ya misheni ya Africa Inland Mission (AIM) iliyokuwa kijijini Bulima kuanzia mwaka 1950.[8] Walimu wake walikuwa watanzania na walifundisha kwa kisukuma.