It's the kanji for mouth. Depending on context, it can be pronounced "kuchi", "guchi", or "kou".

That's the big problem with logographic writing systems: there's no connection between the symbol and the sound. Japanese lets you fall-back to phonetic alphabet, but other languages (Chinese) don't have that feature.

Still, that was a fun post to read.

Curiously, a stereotypical infant directed speech instance that seems distinctly "oral" [0] is the union of those three options: "coo-chee, goo-chee, [k|g]oo".

[0] Perhaps only idiosyncratically.

It's also hanzi character for mouth, the Chinese ideograph system that Kanji is derived from

Not to mention that the katakana for "ro" looks really similar depending on font: ロ

But there's usually context given.