Here is a video guide on how to find all locations for every Collectible in the game!
Aragami 2 All Collectibles Guide
Half-Primer/Half-Written Guide
0:00 Kakurega Village (3)
– Essence Rune: Earth
– Essence Rune: Defense
– Black Dye [Post #9, or through wall]
1:47 Lone Mountain (6)
– Golden Statue #1, 14, 22, 31
– Golden Statue #1, 14, 22, 31
– Golden Statue #1, 14, 22, 31
– Golden Statue #3, 8, 31, 37
– Golden Statue #3, 8, 31, 37
– Essence Rune: Protection #3, 8, 31, 37
3:40 Distant Countryside (3)
– Golden Statue #5, #10, #43
– Golden Statue #5, #10, #43
– Golden Statue #5, #10, #43
5:03 Highcastle (7)
– Golden Statue #4, 21, 49
– Orochi Sword #4, 21, 49
– Golden Statue #4, 21, 49
– Golden Statue #6, 11, 21, 29, 49
– Red Dye #11, 21, 29, 49
– Essence Rune: Silence #11, 16, 49
– Golden Statue #16, 49
8:58 Big Akatsuchi Mine (5)
– Essence Rune: Attack #7, 9, 13, 26, 44
– Golden Statue #7, 9, 13, 19, 26, 44
– Golden Statue #9, 13, 34, 44
– Brown Dye #9, 13, 19, 34, 44
– Golden Statue #9, 19, 26, 44
11:31 Isolated Village (7)
– Legacy Trousers #12, 18, 23, 39
– Golden Statue #12, 18
– Golden Statue #12, 18
– Ronin Trousers #23, 39, 42
– Essence Rune: Agility #23, 39, 42
– Cyan Dye #23, 39, 42
– Kasai Leggings #23, 39, 42
14:19 Akatsuchi’s Capital (9)
– Golden Statue #15, 33
– Purple Dye #15, 33
– Ronin Vest #15, 25, 27, 35, 47
– Essence Rune: Energy #15, 27, 35, 47
– Vagrant Blade #15, 27, 35, 47
– Golden Statue #15, 25, 27, 35, 47
– Golden State #25, 27, 33, 47
– Essence Rune: Flight #38, 47
– Turquoise Dye #33, #38
18:19 Daikizo Mine (4)
– Essence Rune: Wrath #20, 24, 30 36
– Legacy Attire #20, 24, 30, 36
– Orange Dye #20, 24, 30, 36
– Golden Statue #24, 30, 36
19:46 Devastated Village (6)
– Ronin Mask #28, 41
– Conflagration Blade #28, 41
– Crimson Dye #28, 41
– Light Yellow Dye #32, 41
– Essence Rune: Warrior #32, 41
– Tengu Blade #32, 41
22:38 Akatsuchi Palace (10)
– Essence Rune: Block #40, 45
– Golden Statue #40, 45
– Tengu Trousers #40, 45
– Grey Dye #40, 45
– Golden Statue #40, 45, 48
– Legacy Hood #40, 48
– Kasai Armor #40, 48
– Kasai Mask #40, 48
– Kurotsuba Blade #45
– Essence Rune: Toughness #45
28:14 Woods of Memory (7)
– Kurotsuba Headband #46, 50
– Kurotsuba Armor #46, 50
– Tengu Vest #46, 50
– Tengu Mask #46, 50
– Kurotsuba Leggings #46, 50
– Golden Statue #51
Thanks to Ghostzapper for his great guide, all credit to his effort. you can also read the original guide from Steam Community. enjoy the game.