TY JOUR TI Custom and reason as sources of Japanese law in the Meiji era KW comparative law KW Boissonade KW source of law KW custom KW reason KW Meiji KW Japanese law KW gap in law KW natural law JO Legal Science and Practice: Journal of Nizhny Novgorod Academy of the Ministry of Internal Affairs of Russia AU Romanovskaya, V.B. AU Puzhaev, V.V. PY 2021 IS 2020 PB Nizhny Novgorod Academy of the Ministry of the Interior of Russia