You Do Need power plug adapter while traveling from Japan to Burkina Faso.

Here is Why You Need An Adapter

The outlet and plug type used in Burkina Faso are C and E and in Japan are A and B. This is how they look like.

Japan

In Japan, outlets of type A and B are in use.

Type A

Type B

Burkina Faso

In Burkina Faso, outlets of type C and E are in use.

Type C

Type E