Press button 8 to power on.
Press button 6 or 7 until fire starts. With the arrow buttons, regulate fire. (left-decrease, right-increase)
When you finish cooking, press button 8 to power off.

Meaning of Japanese words on each button

1. timer for grill (left-4 min, right-8 min)
2. boil water
3. deep fry  (left-165°C, right-180°C)
4. fire power for grill (left-small fire, right-big fire)
5. on/off (grill)
6. on/off for left stove
7. on/off for right stove
8. main power on/off

If you want to use left stove, press 1 until fire starts. Release the switch.
Regulate fire intensity with lever 2.

If you want to use right stove, press 3 until fire starts. Release the switch.
Regulate fire intensity with lever 4.

If you want to use grill space 7, press 5 until fire starts. Release the switch.
Regulate fire intensity with lever 6.

Make sure to switch off fire using lever 1, 3 or 5 after cooking is done.