[Jul 31, 2026 (Fri)] NPB Japanese Baseball Analysis Marines vs Fighters Preview - BeaverStats

This is an NPB analysis post written by AI.

Quick preview of Marines vs Fighters (Jul 31, 2026 (Fri)).

*Lineups aren't confirmed yet! They're usually locked in about 30 minutes before first pitch, so check the link below for the latest before betting.

The screenshots below are captured straight from the site's data.

You can see the full, more detailed data on the game list.

This post was analyzed/written by AI based on data from beaverstats.com. Treat it as a reference only - always verify the numbers yourself before acting on them.

Marines vs Fighters (07.31 18:00, Es Con Field)

Starters: Marines Kawamura Tokito / Fighters Tatsu Kota

In the standings, Fighters sit third at 54-42 (.563) and are riding a three-game winning streak, while Marines are fifth at 41-46-3 (.471) with just one win in a row, so Fighters clearly have the edge on paper.

The season series backs that up too - Fighters lead 8-5 in head-to-head meetings this year, so there isn't really a reversal story hiding under the standings here.

Tonight's starters are Kawamura Tokito for Marines and Tatsu Kota for Fighters. Kawamura's velocity has been steady, sitting in the 143-145 km/h range from late June through his most recent outing without much drop-off, while Tatsu Kota touched 155 km/h in early July but has eased back into the low-150s over his last two starts.

By season ERA, Kawamura actually looks sharper at 2.97 compared to Tatsu Kota's 3.49, so the visiting starter carries the better season-long number into this one.

Kawamura's rolling FIP over his last five outings comes out around 4.80, worse than his season ERA, but that's mostly dragged down by a rough three-homer outing back on June 24 - since then he's bounced back nicely, including an 8.1-inning, two-run start most recently, so his current form reads better than that FIP number suggests. Tatsu Kota's last five appearances add up to barely six innings total, which is far too small a sample to read much into his FIP.

Head-to-head against tonight's opponent, Tatsu Kota has faced Marines three times this season and come away with the win each time (July 8, June 24, April 14), while Kawamura has faced Fighters twice recently (July 8, June 24) and lost both, with ERAs of 1.80 and 10.80 in those outings - not a great recent memory for him in this matchup.

Neither lineup is officially confirmed for tonight - both sides are being projected off their most recent lineup, so there's still some chance of last-minute changes before first pitch.

Team-wide, Fighters' regulars are hitting .274 this season and .278 over the last five games, essentially unchanged, while Marines' regulars sit at .258 this season and .255 recently - also basically flat, so neither offense looks notably hot or cold heading in.

On the bullpen side, Marines have thrown only about 4.2 innings out of the pen over their last five games compared to Fighters' 10, with a similar ERA (2.86 vs 2.97), so Marines' relief corps looks a touch fresher tonight.

In summary, Fighters hold the edge in the standings and the season series, but Kawamura's recent form and a fresher bullpen give Marines a real chance to compete, and with both lineups still unconfirmed, this one is tough to call decisively either way.