Signage system on IJN fuel drums

Hi all,

Was there any standardization in signage on fuel drums of IJN beside the anchor sign? I've not found clearly visible pictures of that, but it seems they used the following pattern. Above the anchor sign they put

• a kanji prefix (not always), maybe the "type" in Japanese,
• the letter "A" (maybe "aviation") followed by the octane number, then the letter "G" with unknown meaning,
• and perhaps the manufacturing date below the anchor.

The first picture is an exception. I suppose it's not aviation fuel.
Also, three white stripes on the body of the drums and the faces were used. It's meaning maybe "highly flammable".

Does anyone have information on this?

Regards,
Karoly