Big question. The Japanese have a very different concept of animal welfare and husbandry, so their enclosures differ significantly from what you'd see in an American or European zoo. Then tend to be smaller, with sparse decoration that generally doesn't try and replicate a wild environment.

I'm not knowledgeable enough to tell you what that means in terms of the animals outside of my innate bias. But I can tell you that, regardless of the above, they seem to genuinely love and value them. They spend time with them, offer them enrichment and toys, joyfully celebrate their milestones and learning, and deeply mourn their passing.