From there, you can take a bus (still on the same pass) along the Sumiko River to Odawara, and then back by train to Tokyo.
Once in Odawara, you have to call a taxi to get back to Tokyo.
mnli hypothesis: Once in Odawara, you have to call a taxi to get back to Tokyo. premise: From there, you can take a bus (still on the same pass) along the Sumiko River to Odawara, and then back by train to Tokyo.