I went on a Sunday and I saw many Japanese out with their families for picnic at Senjojiki. I cycled to Senjojiki from Senzaki Station in Nagato city. I started by renting an electric bicycle from the rental shop at the pier near Senzaki Station. From there, I cycled along the coast to reach Nagato-Furuichi Station. Then, it was an uphill cycle up to Senjojiki and then downslope to Motonosumi Inari Shrine. The to and fro journey took me 6 hours + 1 hour for lunch. Back to Senjojiki, the location is on top of a hill and there is a good view of the rice fields near Nagato-Furuichi Station. It got slightly foggy which was quite interesting. You can also see some birds (eagles or falcons maybe) circling the skys. This is definitely worth a visit if you visit Nagato city! However, I would suggest that you cab here. (The cycling is quite tough)