If you wish to search for baby-friendly ryokan options in Japan, head over to Jalan or Rurubu. While the website provides English translations and, yes, baby-friendly filters, it's still tough to sort and find the right room for your family.
Thankfully, we've done all the digging and given you our top recommendations for ryokans around Japan. If you're looking for more of a home-away-from-home experience near the city, check our curation of top glamping sites in Tokyo.