It's strange, here (Windows 2007), with the Japanese characters in the log, if I right click in the window log > font... Tahoma is displayed correctly, in size 12 and Normal.
If I copy the Tahoma Japanese text from the log, and paste it in 'Ms Writer', it tells me 'MS Gothic'.
Otherwise, the display did not seem particularly ugly to me, it must depend on the resolution of the screen (1366*768 here).
However reducing the display in the log to Tahoma size 11 and passing it to Bold seemed prettier ... But it's subjective, I think.