Although it is 17 kilometres outside of the city's heart, Hakone Hot Springs is definitely worth considering. It has 14 accommodation options to select from, Hakone Yumoto Onsen Tenseien and Hotel Okada.
For some alternatives, look at the Jinya Ryokan and the Resorpia Atami. They are 9 kilometres and 30 kilometres respectively from the center. If these aren't for you, you can try the Hakone Yunohana Prince Hotel or the Hilton Odawara Resort & Spa.
The nearby cities of Saidachi and Hakone are definitely worth seeing. Saidachi is 12 kilometres to the east of Shibusawa, while Hakone is 20 kilometres to the southwest. Hotels in Saidachi are the HOTEL LiVEMAX Hiratsuka-Ekimae and Hotel Route-Inn Isehara. The Ryuguden and Hotel Green Plaza Hakone are some of the ones in Hakone.
If you are really into sports and want to watch games, you could head to Odawara Arena, which is located to the south of Shibusawa. The Hotel Kunimi Odawara and the Hotel Kunimi Kamonomiya are close to all the action.
Hotels in Shibusawa start at AU$69 per night. Prices and availability subject to change. Additional terms may apply.