Masda normal
Japanese ますだ
Romaji Masuda
Personal Information
Status Kohinata resident
Birthday November 17th
Likes Games, matcha food
Dislikes Kohinata
Appeared in

Masda is a recurring character in Logicalism categorized under the Kohinata-tei page.


Masda has dark long wavy hair. With his long bangs, sometimes his green eyes are unseen (they can be seen red at times), and he has a mole under his left eye.

Masda wears a long sleeved dark shirt with a green stripes overshirt and short brown pants. He's mainly seen wearing indoor slippers.


Lives a hikikomori life everyday. His full name is Akimaru (秋丸) Masda (増田). He's also sometimes referred to as "Master" (マスター) and "Massun" (まっすん).

Masda is a resident in Kohinata's house. You'll be able to meet him both in the game (Kohinata-tei no Bansan) and the site as a part of several "choose your adventure" games in Logicalism. In Kohinata-tei no Bansan, you'll meet him in a room full of mountains of trash. Unlike Kohinata, he'll help you either by hiding or covering for you so you could leave the house safely.

He has created several humanoid robots that are also residents of the house (such as 10, 15, 23 Mk-Ⅳ,) They all call them "master", although he replies saying he's 'not' their master. Masda doesn't seem to be in very good terms with Kohinata.

How to Reach Kohinata's HouseEdit

Kohinata's house has its' own section in Logicalism and it can be found in the 'artworks' section. Scroll down and you'll see a garbage can icon on the bottom right side of the page. Click on the icon and 23 and Kohinata will appear.

Wait and look for a chance to sneak in (隙を見て潜入する) and you'll finally reach his house.


Role in "Kohinata-tei no Bansan"Edit

In Kohinata-tei no Bansan; a man will greet and welcome you to his house. There various food will be available on the table and he'll take his leave. Don't eat the food or you'll receive a BAD END. Answer the phone call you hear instead. There, you'l hear a girl's voice (Natsuki Kori) who'll reveal the possible name of the owner of the house you were in; Kohinata.

After meeting either Tetsuro or Alice, pick the first option (room on the further back) and you'll find Masda in a room full of garbage. He'll talk to you for a bit, and later tell you to go to the room to the left of there.

You'll meet Masda again in an omake ending with Shirakawa Haruka after you get the "Kohinata and Tetsuro" ending.

Role in "Naki Oukoku no Phantom"Edit

Masda is the first person you meet in the game and he'll be a very useful guide to you throughout the game. His weapon is a gun and most of his skills involve that weapon of his. Most of the time, you'll go to his house to discuss the next course of action in the game.

Role in the ComicsEdit

Information Panel
Romaji Masuda-san to Kohinata-sensei
Featuring Gin'ya Tetsuro, Kohinata, Masda
Publish date August 2011
Continuity Masuda-san to Kohinata-sensei Sono 2
Comic masda1

In one strip, Tetsuro wanted to light up fireworks one day and Kohinata read out the instructions. Kohinata pointed the fireworks at him as he reads "point towards people and use".

As he was doing that, Masda saw a plate of cookies made by Kohinata. Masda said although Kohinata was good at cooking, he wondered why Kohinata became a teacher and he took one of his cookies. Kohinata later threw a fork at him saying he doesn't forgive anyone who steals his food.

Information Panel
Romaji Masuda-san to Kohinata-sensei Sono ni
Featuring Kohinata, Masda
Publish date December 2013
Continuity N/A
Teikumi 2

Masda was creating an avatar in a game and somehow his creation was moving very weirdly. Kohinata later came into the picture and mentioned that he wanted to go shopping but he wasn't sure if he could carry it all by himself. He later said he had the sudden urge to smash a watermelon. Masda then volunteered to come with him and carry the bags.

Kohinata commented saying there were a lot of couples on the street, and Masda told him it was Christmas Eve's and only couples were out at the time. After hearing him said that Kohinata walked home earlier than Masda; and he thought that Kohinata was acting more human than usual.

Information Panel
Romaji Okashi na Yume wo Mita
Featuring Kohinata, Masda
Publish date January 2014
Continuity N/A
Comic masda2

Masda had a dream one day. He saw someone he thought he knew, and he introduced himself as Fuyuyuki. The boy invited him to create ******** (the words were unseen) together. The dream was later cut off as the boy said "of course you need to be there, because you are...".

Masda had a feeling that dream didn't belong to him. As he woke up, he asked about Tetsuro to Kohinata who was beside him and asked where he was. Kohinata replied saying he'd taken the 'sample' and he had no use of it anymore. In the end Masda thought he was nothing more than another inhabitant of that hopelessly capricious world.


  • In February 2014's Valentine Event, Masda won third place. (a number of 131 chocolates / votes)
  • According to a "favorite Logicalism character" questionnaire in March 2015, Masda won second place.