каштаны в японии всегда очень ценились в эстетическом плане, поэтому их всегда рисовали стилизованно в виде алмазов или рубинов - ромбиками =)
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"Mitsubishi" and the Famous Three-Diamond Mark
The name "Mitsubishi" refers to the three-diamond emblem. "Mitsubishi" is a combination of the words mitsu and hishi. Mitsu means three. Hishi means water chestnut, and Japanese have used the word for a long time to denote a rhombus or diamond shape. Japanese often bend the "h" sound to a "b" sound when it occurs in the middle of a word. So they pronounce the combination of mitsu and hishi as mitsubishi.
Yataro Iwasaki, the founder of the old Mitsubishi organization, chose the three-diamond mark as the emblem for his company. The mark is suggestive of the three-leaf crest of the Tosa Clan, Yataro's first employer, and also of the three stacked rhombuses of the Iwasaki family crest.
Фишечка Когда поступаешь правильно, люди начинают думать, что всё складывается само собой.. /Futurama