Mitsubishi Corp. will acquire Aethon’s US gas and pipeline assets for $7.5 billion including debt, its biggest shale deal to date.

Mitsubishi Corp. agreed to buy Aethon Energy Management LLC’s US gas and pipeline assets for $5.2 billion, the biggest purchase by a Japanese company in the American shale sector.

Japanese trading house Mitsubishi Corp will buy the U.S. shale production and infrastructure assets of Aethon Energy ...