Here is the full list of all 16 Akihabara - there are Feel the Rhythm achievements.
Complete the Campaign
Get a score of at least 40 000 on one song
Complete the campaign without using a continue
Get a high score of at least 200 000
Complete the campaign on normal difficulty and get at least 400 perfect
Have a score multiplier of 25 for 2 minutes on normal difficulty
Complete the campaign on hard difficulty
Get a high score of at least 400 000
Complete the campaign on hard difficulty without activating the super charge
Complete the campaign on normal difficulty and get no more than 50 bad
Have a score multiplier of 25 for 2 minutes on hard difficulty
Complete on turbo speed on normal difficulty
Complete the campaign on turbo speed on hard difficulty and get a score greater than 20 000
Have a total playtime of at least 5 hours
Get a collected score of at least 4 000 000
Perfect all tracks in Pure Beat mode