Yamamoto's stats in Japan compared to Ohtani's

Here are his stats in Japan compared to Ohtani's pitching stats in Japan (both Pacific League)  

Stat    Yam    Oht
ERA    1.82    2.52
IP    897    543
H    633    384
HR    36    24
BB    206    200
IBB    2    0
SO    922    624
HBP    25    23
BF    3488    2187
WHIP    0.935    1.076
H9    6.4    6.4
HR9    0.4    0.4
BB9    2.1    3.3
SO9    9.3    10.3
SO/W    4.48    3.12