Nakamura has celebrated his wife’s birthday with eight home runs in eight games over the last ten years. He got married in July 2008 and has hit home runs on September 10 in 2008, 2009, 2010, 2011, 2013, 2016, and 2017 (he hit two in 2010). The only time he did not hit a home run was in 2014.
Multi-home run games: thirty-seven (through June 27, 2018).
October 14 vs Rakuten at MetLife Dome – Nakamura hit a three-run home run off Koji Aoyama in the sixth inning. The home run was the eighth of his Climax Series career and tied the record for home runs during Playoff/Climax Series history, also held by Tyrone Woods and Kazuhiro Wada.
Source: Sponichi 10/15/2017
Nakamura has an equipment contract with SSK. He uses a 33.5 inch bat that weighs 940 grams. The weight is toward the handle instead of the barrel.
Source: Nikkan Sports 1/13/2018