The first chapter discusses general questions. Is Bitcoin a currency? Can it be regulated? How does the Japanese government see it? The second chapter is about licenses and oversight. Banking license, money transfer business license, foreign exchange business license requirements are discussed, along with some relevant court cases. The third chapter deals with market rules like insider trading, market manipulation, and money laundering. The fourth chapter discusses tax law (capital gains and consumption tax), as well as criminal law applying to the theft of bitcoins.