Why was "Mr. Raindrop" transliterated into hiragana rather than katakana? Gintama's ending song from Ep.14 to Ep.24 is &quot;Mr. Raindrop&quot; by Amplified. It is the only theme which is in English.


As you can see, the transliteration above the English words is done in hiragana instead of katakana. Since I can't confidently translate hiragana, I wanted to confirm that was this done intentionally for a joke (if yes, can you please explain it) or it was a careless mistake.
I wanted to confirm that was this done intentionally for a joke (if yes, can you please explain it) or it was a careless mistake.

It is perfectly normal to write furigana (in hiragana) on top of English words for the audience, who are practically all Japanese, to understand and learn how to pronounce.
In addition, furigana is always added on top of English words at any Japanese karaoke in Japan.
So no, it is not a joke nor a careless mistake, just a very common practice.