Originally Posted by
milepig
Most days are arriving by 9 or so and departing at about 5 or 6. Sasebo goes into the evening.
Okay, in that case (assuming you've got 9a-9p), you're going to want to get to Huis ten Bosch by ~3.30p and stay as late as you can. You'll want at least 2-3hrs there before the sun goes down, but the real highlight is the night-time illumination.
As jib points out, not everyone may be into Huis ten Bosch. I completely get that, and I'd totally understand if you skip it. I will say that all the photos on his links make the place look a bit dead and uninspiring. If you ask me, I would describe the place as fun during daytime, romantic at dusk, mesmerizing at night. Plus the baumkuchen they sell there might be the best I've had anywhere.