Park factors

Here are some of the park factors I compiled, with 100 being average. These factors were calculated following the 2012 season, and will be updated following the 2013 season. These factors are calculated for each component using the formula ((homeRS + homeRA)/(homeG)) / ((roadRS + roadRA)/(roadG)).

Tokyo Dome (Yomiuri Giants):

RH:

H (Batter): 96

BB (Batter): 101

K (Batter): 101

HR: 117

H (Pitcher) : 99

BB (Pitcher): 107

K (Pitcher): 95

LH:

H (Batter): 101

BB (Batter): 110

K (Batter): 95

HR: 158

H (Pitcher) : 98

BB (Pitcher): 99

K (Pitcher): 101

The Tokyo Dome is historically a moderately offensive park. It definitely inflates home runs, and is great for lefties (This was the home park for the left handed hitting Hideki Matsui during his time in Japan).

Nagoya Dome (Chunichi Dragons):

RH:

H (Batter): 92

BB (Batter): 96

K (Batter): 105

HR: 62

H (Pitcher) : 86

BB (Pitcher): 99

K (Pitcher): 105

LH:

H (Batter): 86

BB (Batter): 111

K (Batter): 118

HR: 55

H (Pitcher) : 83

BB (Pitcher): 96

K (Pitcher): 105

The Nagoya Dome is the biggest pitchers park in Japan, suppressing hits and home runs, while increasing strikeouts.

Kyocera Dome Osaka (Orix Buffaloes):

RH:

H (Batter): 97

BB (Batter): 96

K (Batter): 95

HR: 117

H (Pitcher) : 94

BB (Pitcher): 91

K (Pitcher): 96

LH:

H (Batter): 92

BB (Batter): 89

K (Batter): 94

HR: 100

H (Pitcher) : 93

BB (Pitcher): 95

K (Pitcher): 89

The Kyocera Dome is a relatively neutral park. It’s much friendlier for righties than lefties.

Sapporo Dome (Hokkaido Nippon Ham Fighters):

RH:

H (Batter): 100

BB (Batter): 93

K (Batter): 94

HR: 83

H (Pitcher) : 100

BB (Pitcher): 97

K (Pitcher): 90

LH:

H (Batter): 105

BB (Batter): 109

K (Batter): 86

HR: 78

H (Pitcher) : 96

BB (Pitcher): 109

K (Pitcher): 94

Another fairly neutral park, this future Olympic soccer stadium hurts home runs a bit, but not massively.

Miyagi Baseball Stadium (Tohoku Rakuten Golden Eagles):

RH:

H (Batter): 96

BB (Batter): 105

K (Batter): 97

HR: 85

H (Pitcher) : 98

BB (Pitcher): 101

K (Pitcher): 98

LH:

H (Batter): 102

BB (Batter): 97

K (Batter): 98

HR: 76

H (Pitcher) : 104

BB (Pitcher): 98

K (Pitcher): 100

Miyagi Baseball Stadium is interesting, because it is a mostly neutral park, except for home runs. It suppresses home runs significantly.

Fukuoka Yafuoku! Dome (Fukuoka SoftBank Hawks):

RH:

H (Batter): 96

BB (Batter): 103

K (Batter): 112

HR: 80

H (Pitcher) : 99

BB (Pitcher): 97

K (Pitcher): 115

LH:

H (Batter): 94

BB (Batter): 97

K (Batter): 117

HR: 83

H (Pitcher) : 88

BB (Pitcher): 98

K (Pitcher): 111

The recently renamed Fukuoka Yafuoku! Dome is a pretty all around pitcher’s park. It ups strikeouts, and lowers hits and home runs.

Mazda Stadium (Hiroshima Toyo Carp):

RH:

H (Batter): 101

BB (Batter): 99

K (Batter): 100

HR: 92

H (Pitcher) : 101

BB (Pitcher): 99

K (Pitcher): 97

LH:

H (Batter): 104

BB (Batter): 95

K (Batter): 95

HR: 79

H (Pitcher) : 108

BB (Pitcher): 96

K (Pitcher): 101

The Mazda Dome, AKA Hiroshima Municipal Stadium, AKA MAZDA Zoom-Zoom Stadium HIroshima is a fairly neutral park, except to left handed home runs.

Meiji Jingu Stadium (Tokyo Yakult Swallows):

RH:

H (Batter): 111

BB (Batter): 94

K (Batter): 95

HR: 142

H (Pitcher) : 109

BB (Pitcher): 101

K (Pitcher): 100

LH:

H (Batter): 105

BB (Batter): 100

K (Batter): 105

HR: 181

H (Pitcher) : 115

BB (Pitcher): 94

K (Pitcher): 101

Meiji Jingu Stadium massively inflates home runs. This is interesting, because Wladimir Balentien, who just broke the NPB single season home run record,  plays for Yakult, so the stadium certainly helped.

Yokohama Stadium (Yokohama BayStars):

RH:

H (Batter): 107

BB (Batter): 120

K (Batter): 98

HR: 130

H (Pitcher) : 111

BB (Pitcher): 105

K (Pitcher): 96

LH:

H (Batter): 107

BB (Batter): 93

K (Batter): 90

HR: 128

H (Pitcher) : 109

BB (Pitcher): 118

K (Pitcher): 94

Yokohama Stadium doesn’t have balls fly out of it quite as much as Jingu, but it’s an all around offensive park, with hits, walks, and home runs going up, with strikeouts going down.

Seibu Dome (Saitama Seibu Lions):

RH:

H (Batter): 104

BB (Batter): 99

K (Batter): 98

HR: 126

H (Pitcher) : 105

BB (Pitcher): 107

K (Pitcher): 98

LH:

H (Batter): 104

BB (Batter): 102

K (Batter): 95

HR: 114

H (Pitcher) :109

BB (Pitcher): 100

K (Pitcher): 99

The Seibu Dome is an all around slight offensive park.

Koshien Stadium (Hanshin Tigers):

RH:

H (Batter): 96

BB (Batter): 93

K (Batter): 108

HR: 67

H (Pitcher) : 98

BB (Pitcher): 95

K (Pitcher): 113

LH:

H (Batter): 97

BB (Batter): 92

K (Batter): 113

HR: 86

H (Pitcher) : 99

BB (Pitcher): 97

K (Pitcher): 104

Koshien has long made pitchers look better, it’s a fairly large pitcher’s park. Better for lefties to hit in than righties.

Chiba Marine Stadium (Chiba Lotte Marines):

RH:

H (Batter): 101

BB (Batter): 105

K (Batter): 98

HR: 93

H (Pitcher) : 101

BB (Pitcher): 104

K (Pitcher): 99

LH:

H (Batter): 103

BB (Batter): 111

K (Batter): 101

HR: 86

H (Pitcher) : 105

BB (Pitcher): 110

K (Pitcher): 98

Chiba Marine Stadium is fairly neutral.


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