A power adjustment method whereby a modulation index is calculated from reproduced signals of patterns recorded by irradiating light onto an optical information recording medium with {TAIL ~ a recording power} varied and for which {HEAD ~ an optimum power} of irradiation light is set up using the modulation index, the power adjustment method comprising: 
for is set up
A power adjustment method whereby a modulation index is calculated from reproduced signals of patterns recorded by irradiating light onto an optical information recording medium with { TAIL ~ a recording power } varied and for which { HEAD ~ an optimum power } of irradiation light is set up using the modulation index , the power adjustment method comprising :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH REL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH