---
title: "Imouto Kansatsu Nikki"
description: "Main character discovers a hole in the wall leading to his sister's room. What he sees there is beyond his imagination - sister reads erotic books and gets unco"
image: "https://t.vndb.org/cv/35/3735.jpg"
---

# Imouto Kansatsu Nikki

![Imouto Kansatsu Nikki](https://t.vndb.org/cv/35/3735.jpg)

**Alternative Title:** いもうと観察日記

**Developer:** Triangle

**Release date:** Dec 13, 2002

**Platform:** Windows, DVD

**Language:** Japanese

**Rating:** 6.0/10 (8 votes)

## Description
Main character discovers a hole in the wall leading to his sister's room. What he sees there is beyond his imagination - sister reads erotic books and gets unconsciously excited! Moreover, the erotic book is one from protagonist's own hidden stash. He can't hide his voice in exclamation, and his sister walks out to return him his book. From that day siblings relations can never be the same. 

[From [vndbreview](https://vndbreview.blogspot.com/2019/04/vn-of-month-december-2002-popotan.html)]

## Characters
### Amako Yuzuha (天虎 柚巴)
- **Gender:** Female
- **Measurements:** Height: 147cm, Weight: 35kg, Bust-Waist-Hips: 68-56-75cm
- **Hair:** Black, Antenna, Waist Length+, Ringlet, Sidehair
- **Body:** Teen, Slim, Pale
- **Eyes:** Black
- **Role:** Classmate, Sex Friend
- **Clothes:** Sailor School Uniform, Ribbon Headband
- **Voiced by:** Iida Kuu

### Kawahara Maya (川原 麻耶)
- **Gender:** Female
- **Measurements:** Height: 168cm, Weight: 55kg, Bust-Waist-Hips: 88-62-96cm
- **Hair:** Ponytail, Green
- **Eyes:** Brown
- **Body:** Slim, Pale, Young-adult
- **Clothes:** Thigh-high Stockings, Ribbon Hair Tie
- **Role:** School Nurse
- **Voiced by:** Oboredani Rias

### Mikogami Karin (巫女神 華鈴)
- **Gender:** Female
- **Measurements:** Height: 152cm, Weight: 40kg, Bust-Waist-Hips: 72-55-75cm
- **Hair:** Brown, Waist Length+
- **Eyes:** Brown
- **Body:** Teen, Slim, Pale
- **Role:** Non-blood-related Sister, Younger Sister
- **Clothes:** Maid's Dress, Collar, Strap-on Dildo, Ribbon Hair Tie, Sailor School Uniform
- **Engages in:** Cosplay, Bondage
- **Personality:** Energetic
- **Voiced by:** Momoka-chan

## Shops
- [Official Website](https://web.archive.org/web/20110315164356/https://www.blackrainbow.jp/dvdpg/tri2.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=36144)

## Releases
### Japanese
- **2002-12-13**: Imouto Kansatsu Nikki - [Official website](http://www.route2.co.jp/Triangle/Products/Imouto/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=2443), [Getchu](http://www.getchu.com/soft.phtml?id=18116)
- **2004-03-11**: Triangle H Super Remix Vol.2 DVDPG Edition ~"Imouto Kansatsu Nikki" & "Love Love Strange Days" & "Omakase☆Demakase Angel!!"~ - [Official website](https://web.archive.org/web/20110315164356/https://www.blackrainbow.jp/dvdpg/tri2.html), [Getchu](http://www.getchu.com/soft.phtml?id=36144), [DMM](https://www.dmm.co.jp/mono/anime/-/detail/=/cid=1020br25/)

## Tags
ADV, Raising Simulation, Imouto-type Heroine, Multiple Endings, Nukige, Protagonist's Non-blood-related Sister as a Heroine, School Nurse Support Character, Student Heroine, Netorare, Bad Ending(s), Ponytail Heroine, Completely Avoidable Netorare, Female Domination, Sexual Devices, Strap-on Dildos, Anilingus, Masturbation, Voyeurism

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---
*View the full details at [pinovel.net/v3092](https://pinovel.net/v3092).*

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```