Hōnen-in Temple was very quiet and tranquil during my morning visit (around 9 am), and I literally was alone there at that time. I was not able to enter any of the buildings, but the Temple's grounds are still so beautiful that in my opinion, it is definitely worth a 5-minute detour from the Philosopher's Path (especially considering that there is no entrance fee). There are lots of maple trees over there, which also makes it an absolute must-visit spot during autumn for those red Momiji views. There are two ways to approach its entrance, and I recommend coming through this one: Google maps link