What is the difference between a Japanese Akita and an Akita Inu?

Excuse me, but could you please elaborate on the distinction between a Japanese Akita and an Akita Inu? I've heard the terms used interchangeably, but I'm curious if there's a specific difference in breed characteristics, origins, or any other defining factors that set them apart. Could you clarify the nuances and help me understand the distinction better? Thank you in advance for your insight.