On February 27, 2020,  Shimma lectures at SOFTIC seminar on “hanreikara manabu DXjidai no sisutemukaihatsutoraburu wo fusegu chie : sofutouea kaihatu funsou  hanreikenkyukai seikahoukoku No.2  sisutemukaihatu niokeru sigoto no kansei to houshuseikyu” (Wisdom to prevent system development troubles in the age of DX learned from the study of legal cases: Report of  Study Group on Judicial Precedents involving System Development Troubles No. 2:   Completion of Work and Remuneration  Claim )