When in Onomichi, I definitely recommend taking the ropeway up the hill to Senkoji temple. From there you get a great view of the Seto Inland sea, and neighbouring Mukaijima Island. There is an observation building at the top as well as the various buildings that make up Senkoji.
Mind you though, it is possible to walk up as well, although most people seem to get the ropeway up and then walk down.
280 yen one way for adults
At the top Mt. Senkoji is where the main temple is located, Senkoji Temple. It is here where there is a bell at the Kyoonro (amazing sound tower) that is rung during a midnight ceremony during New Year's. It is here where you can make a prayer/wish to your zodiac sign. It is also here where you can get lucky charms.
Want to make a buddha? Well, you can only make a clay version here at Jikoji Temple, the 1st temple on your temple tour. And it only costs 500yen. An instructor will help you with the buddha making if you have any questions.
From JR Onomichi Station, start walking towards the start of the temple tour. A map of the tour can be found in Onomichi Station & although most of the information is in Japanese, names of the temples are in both Japanese & English.
It will take at least 1 1/2 hrs to tour through the temples but may take longer if you want to linger at certain temples & how long you stay in the park area where you can see a view of Onomichi from the hilltop.
Be sure to bring comfortable walking shoes (no high heels!) & drinking water. The walk is not strenuous but at times there are high steps to walk up & down.
The 12 zodiac animals at Senkoji Temple: rat, ox, tiger, rabbit, dragon, snake, horse, goat, monkey, rooster, dog & pig.
Saikokuji Temple is in honor of the straw sandals. Straw sandals of all sizes are hung at the entrance of the temple. It is believed that this temple was built by a priest,Gyoki.
This is how the temple path looks like. Follow the white stoned path & it will take you to the various temples along the tour.
At Komyoji Temple you can compare your handprint size with the handsize of the 12th sumo wrestler.
Along the path of the temple tour there are other sumo handprints as well.