This is the japanese version of the two achievements below:
You cannot get this achievement on your first playthrough, so don't even try. You must get all of the following items on your Encore (2nd) playthrough.
The list of items, and how to get them, are as follows:
EZI Cracker - Play Score Piece 2 for the Gentlemanly Pop in the square of Forte City.
EZI Certificate - Play Score Piece 5 with Wiseman Maracas in the Glissando Cliffs.
EZI Photo - Play Score Piece 20 with Lonely Pitch at Lake Reverb.
EZI Scarf - Play Score Piece 4 for Captive Congo on the Pirate Ship Dolce. (3F-NW Door)
EZI Egg - Play Score Piece 14 for Killer Bell Lyre in a hidden cave in the Sharp Mountains.
EZI String Phone - Play Score Piece 1 for Celebrity Marcato in Baroque Castle. (2F-East)
Smiling EZI - Play Score Piece 6 for Contrary Marimba outside Hotel Ensemble in Baroque City.
Cherry EZI - Play Score Piece 3 for Worrywort Horn by the fountain in Ritardando.
EZI Pajamas - Play Score Piece 11 for Shallow Sweet in Baroque Castle. (2F-West)
EZI Paddle - Play Score Piece 7 for Granny's Girl Quena in the upper room of Hotel Ensemble in Baroque City.
EZI Handkerchief - Play Score Piece 18 for Conceited Choir in Baroque City.
Elite EZI - Play Score Piece 21 for Solitary String (cat) in Tenuto.
EZI Pendant - Play Score Piece 27 Methodical Gospel in Ritardando.
Small EZI - Play Score Piece 29 for Precocious Flute by the cave in Agogo Village.
Swimming EZI - Play Score Piece 15 for Twilight JuJu in the Chorus Plains.
Laughing EZI - Play Score Piece 9 for Strolling Ghost Note in Hanon Hills.
EZI Pocketbook - Play Score Piece 13 for Tenacious Coronet in the left room of Cantabile Inn. -IMPORTANT!!! - There are two children in this room that BOTH give you items for playing Score Piece 13. You MUST play Score Piece 13 with the purple-haired girl near the window who is NOT walking around the room. In this version of Eternal Sonata, only she will give you the EZI Pocketbook, the other child will give you a different item.
Weekly EZI - Play Score Piece 16 with Gentle Harp in Baroque City.
Rainbow EZI - All the way to the east of Elegy City, inside a small urn. It is in front of the steps that takes you to the dunes.
EZI Bun - Play Score Piece 28 for Glamorous Oboe in Elegy City.
Chapel EZI - Talk to the four statues outside the entrance to the Double Reed Tower of Sand. Only one will talk to you at the start, but once you've spoken to him, talk to the other three. Then move back towards the single stone head in the middle of the area. Play Score Piece 13 for Desolate Saburo in the Noise Dunes. As soon as you get the Chapel EZI item, the achievement will pop.