I certainly can see how many of these characters, those more toward the lower right, are very much Katakanan in character, particularly so in that they look like the brush strokes if Japanese Calligraphy.
Info on Katakana :
Japanese Katakana
Origin
The katakana syllabary was derived from abbreviated Chinese characters used by Buddhist monks to indicate the correct pronunciations of Chinese texts in the 9th century. At first there were many different symbols to represent one syllable of spoken Japanese, but over the years the system was streamlined. By the 14th century, there was a more or less one-to-one correspondence between spoken and written syllables.
The word katakana "part (of kanji) syllabic script". The "part" refers to the fact that katakana characters represent parts of kanji.
Characteristics and usage of katakana
The katakana syllabary consists of 48 syllables and was originally considered "men's writing". Since the 20th century, katakana have been used mainly to write non-Chinese loan words, onomatopoeic words, foreign names, in telegrams and for emphasis (the equivalent of bold, italic or upper case text in English). Before the 20th century all foreign loanwords were written with kanji.
Katakana are also used to write Ainu, a language spoken on the northern Japanese island of Hokkaido.
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http://www.omniglot.com/writing/japanese_katakana.htmstyles of Katakana:
http://www.google.com/search?q=Katakana&hl=en&client=opera&hs=8me&rls=en&channel=suggest&prmd=ivns&tbm=isch&tbo=u&source=univ&sa=X&ei=9usZTu_LHcrUiALCsqDlCg&ved=0CDAQsAQWell. If I REALLY want to know, I know just what to do!
Paint the symbols on my roof along with a peace sign of some sort... say, three or seven interlocking rings, and see who shows up!
(Um... honey? You'll never guess who's stopped by for dinner...~)
Question is, do I want to get the up close and personal with it!
Thanks OTF, for the graphs above, they are much clearer than what I was trying to deal with before.
-Montana