"kobe_2017.txt" contains wave observations at KB (Figure S1) conducted by NOWPHAS.
From left to right:year, month, day, hour, minute, second, wave number,
                   mean wave height, mean wave period,
                   significant wave height, significant wave period, 
                   the highest one-tenth wave height, the highest one-tenth wave period,
                   the highest wave height, the highest wave periods,
                   wave direction(nautical convention in degree)
Each value is separated by a space.
Original data are available at 
    https://www.pa.cgr.mlit.go.jp/suishitu/
