Nothing's better than chilling out by the water while you're on vacation. Enjoy an afternoon picnic at Lake Tanuki and then stick around for a peaceful sunset.
You'll be spoiled for sightseeing choice when visiting Fujinomiya. Lake Tanuki is an ideal place to start here, but there are lots of other worthy sights to consider. Taiseki-ji Temple, Makaino Farm, and Shiraito Falls are near the body of water and and will cap off your day nicely.