@Dodge For comparison, if possible, could you post a few of those crowd numbers?
I found these crowd numbers of the first round of the Japan League One competition (Division 1). I have no idea whether those crowd numbers are high, or not, as I have no idea what the numbers were in previous years.
Kobelco Kobe Steelers 80-15 Mie Honda Heat (11,419 spectators)
Mitsubishi Sagamihara Dynaboars 30-29 Hanazono Kintetsu Liners (7,852)
Brave Lupus Tokyo 43-30 Shizuoka Blue Revs (11,553)
Toyota Verblitz 15-8 Black Rams Tokyo (9,059)
Kubota Spears Tokyo-Bay 26-52 Tokyo Sungoliath (18,110)
Saitama Wild Knights 53-12 Yokohama Canon Eagles (12,582)
What would be interesting to know is whether the lower crowd numbers in the Premiership are offset by increased tv viewership, similar to what happened in Super Rugby. With the high cost of living and expensive ticket prices, watching from home is attractive financially as you can watch more games for less.