Adjacent stations with similar layouts are provided with underground paths within their premises, but it's considered that such an underground path hasn't been provided here because the use of such a path wouldn't be sufficient to cope with the tremendous congestion during the New Year holiday season.
当駅の前後にある同じような構造の駅はいずれも構内地下道を備えているが、当駅の場合は正月の激しい混雑に地下道では対応が困難なため、設置が見送られているものと思われる。