Your article is well constructed and most importantly: concise. Easy to read, grammatically correct and allows the reader to get a clear understanding of what went through your mind when deciding upon how you want the game to actually look at his final state.
Nevertheless it would have been interesting to get at the beginning a quick explanation on what Omibozu actually is and why the folklore around it makes sense towards your design choice.
Also an image of your own work side to side with your style guide reference could have been a nice touch, because it is intriguing to see how you interpreted this „ink on paper“ technique even if it doesn’t necessarily worked out the way you expected.
Still it is a very good article, it clearly shows that you understood the MDA framework and how the chosen aesthetic/art style impact your game and helps to convey the desired feeling to the player.