I can't really see what is printed on your image, but if this is what I have been through.
This means you need to go into Test Mode (you can set botton in your forestcfg/spicecfg)
after went into test mode, control methods in test mode will be shown at the bottom of the screen.
In case of you don't understand Japanese, here is the steps.
In test mode
→I/O CHECK
→CALIBRATION SETTINGS
→VOL-L turn anti-clockwise 3 round until a green OK appeared then press start botton
→VOL-L clockwise
→VOL-R anticlockwise
→VOL-R clockwise
→you can now return to game, enjoy.