If you come Sawara, I recommend to go to ride on the gondola on the Ono river. You will feel good breeze and nice scenery of this town. 30min, 1200yen.average.
you can find the pier near the "TADATAKA BASHI".
Along the ono river, there are many old fashioned houses. These were built in edo meiji period in japan about 100-200 years before.
Train transport to Sawara is so infrequent, but sometimes there is a seasonally running direct express "Ayame" morning train from Tokyo Station, which would take generally 1 hour journey time.
Otherwise, you'll have to go from Tokyo Station and transfer at Chiba Station to the Sawara-Choshi bound Sobu Line running generally once hourly (do not transfer to the Narito-Choshi bound Sobu Line as this one takes a southern route bypassing Sawara).
Journey time is about 2 hours not including transfer and wait times. The train fee is ticket 1,620yen for basic fare, and roughly double the price if riding an express train.
Other ways of access are via the motorways with your own auto (Higashi Kanto Motorway, Sawara-Katori Exit), or highway bus from Hamamatsucho Bus terminal or Tokyo Station Yaesu Exit Bus Station. See the yellow-labelled timetable for Sawara (bus fee 1,700 yen) at http://www.chibakotsu.co.jp/kousoku/time_chosi_2.htm
The below URL links to the JR train timetable of Sawara Station, week-day schedule. The red times are the Limited Express morning direct trains bound for Tokyo. Unmarked black times are local trains bound for Chiba Station.
From Narita Airport Terminal 2, Bus Stop No. 3, 1F at 10:55 there is a daily tourist bus, with guidance in English, Chinese, and Korean. There are apparently discount coupons available for the gondola-riding excursions and other local shopping.
Return bus is from Sawara Station 15:40, and arrives Narita Airport Terminal same location as above at 16:37.
Favorite thing: Lived from 1745-1818 working in local family business, then later in post-retirement engaged in geographical survey, astronomy and journeying round the country, and succeeded in creating an accurate map of the island(s) of Japan, including at least Honshu, Shikoku, Kyushu and Hokkaido.