Regular Mecho

Regular Mecho and Ocho are two traditional origami butterfly described in "Wrapping Origami" by Yoshihide Momotani (1993). Momotani gives instructions to fold 3 pairs of paper butterflies:
  • Classical Mecho & Ocho (from Kayaragusa)
  • Formal Mecho & Ocho (Traditional), and
  • Regular Mecho & Ocho (Traditional)

Instruction to fold "regular" Mecho is shown below.

Mecho and Ocho are historically important because they are first examples of representational origami. The paper butterflies were used to decorate sake bottles during wedding ceremonies. In current day Japan, Mecho and Ocho are still sometimes used in the same manner; they are not common origami models which you might see everyday.

It is unclear why Momotani uses the word "regular" to describe these butterflies, but the terms "formal" and "regular" will be used to maintain consistency.


Instructions to fold "Regular" Mecho.




Make a waterbomb base. Precrease a square sheet of paper as shown and collapse into an inverted waterbomb.



    Work with the top-right flap.
  1. Fold the edge of the flap towards the central midline. Make a pinch fold (green arrow).



  2. Mountain fold (fold back) the flap so the edge meets the pinch mark made above.





  3. Fold this flap in half (join green dots) so the edge of the flap aligns with the midline.




  4. Repeat with left flap.





  5. a) Mountain fold (fold behind) the tip of the model (this will be the head of the butterfly.
    b) Make a valley fold so the tip of the head protrudes beyond the model.




  6. Mountain fold once more.





  7. Fold in the wings as shown.





  8. Valley fold the head region of the model to get an intricately pleated head.



  9. Done!





Mecho (female)

Ocho (male)



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Evidence from the internet: If you do a google search for "sake bottle decoration" you will find many examples of Mecho, Ocho and other celebratory folds. This blog retells a story of a person who folded paper ornaments for a New Year's spiced sake bottle.
mecho
The model on the right looks almost exactly as the regular Mecho described above. The model on the left is a variation but it is not the same as the regular Ocho. At a glance, the model on the left looks like Mecho from Kayaragusa; however, careful examination of the striations on the paper reveal that it is not folded in the same manner.



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