Tatsuo Yoshidawas a Japanese cartoonist, writer and anime pioneer who founded the anime studio Tatsunoko Productions... (wikipedia)
Even for Toyota, Japan is a very difficult market.
Despite the dissolution of the equity relationship, there should be no major impact on on-going projects between the two companies.
In Japan when you say diesel engine, everyone thinks of rattling, smelly, dirty engines. Demand is almost nil at this moment.