Translation of "Softer" in Japanese

Can we create softer urban systems?

もっと柔らかい都市機能は 作れないだろうか？

Would you kindly speak a little softer?

もしよかったら声を小さくしていただけませんか？

That's much more canine, it's softer. Again, fox is coarse.

犬の臭いだし柔らかい キツネの毛は硬い

My chest had become softer than the fig tree's fruit and my heart had become more fragile than the fig tree's leaves.

僕の胸はいちじくの実よりもやわらかく、僕の心はいちじくの葉よりももろくなっていたのだ。

A human being in perfection should emulate the virtue of the tree. The more the tree grows, the more beautiful and softer it turns, but internally tougher and stronger.

模範的な人は樹の美徳を真似るべきである。育てば育つほど、綺麗で柔らかくなるが、内面的には硬くて強くなるであろう。