Your search for "n gauge fine manual" revealed the following:

Town of Wonders-2: Sankei Kit N(1:150) MK07-05

Park Sliding Board : Icom Pre-Painted Assembly Kit 1:144-N(1:150) EP-12

Heart shaped rail for mini mini train : Yoshiaki Ishikawa Railroad Tracks 9mm gauge N (1:150)

Travellers and Rescuers : Preiser - Painted N (1:160) 79216

Western style window frame: Grant Line unpainted kit (parts) N(1:160) 8005

Store A : Baioudou N (1:150) pre-colored kit ST-028-15C

Passing Men (Labor Style): Preiser - Painted N (1:160) 79099

Jogging and Badminton: Preiser - Finished product N (1:160) 79076

Diver : Preiser - Painted N (1:160) 79088

Wide L Kunekune Rail for Minimini Train, compatible with Daiso case (300x95mm) : Yoshiaki Ishikawa Railroad Tracks 9mm gauge N (1:150)

Graffiti Decal Note:Kobaru Equivalent: Sakatsu N(1:150) 3882

Wireless Base Antenna : Icom Pre-Painted Assembly Kit 1:144-N(1:150) EP-9

Local Station in the Snow : Norihisa Matsumoto - Complete Painting 1:150 Size

Penguin Material G (small size 2) : YSK Unpainted kit HO (1:87) Part No. 407

Spiral Staircase : Plastruct Unpainted Kit 1:100 STAS-100 (90948)

Tsumesho B : Baioudou Pre-colored Kit N (1:150) Scale ST-037-15C

Yukata Set-1 : Icom Finished product N (1:150) HM3

Tennis Net-A : Icom Pre-Painted Assembly Kit 1:144-N(1:150) EP-60

Battery-powered Self-propelled Mini-mini train Hakone Tozan Railway Moha2 : Yoshiaki Ishikawa Finished product N(1:150)

Concrete block sheet : Baioudou N (1:150) pre-colored kit AC-029-15C