35905
When I search meaning, both 原因 and 要因 mean **cause**.

解析 and 分析 mean **analysis**.

But I think there will be little different meaning.
CC BY-SA 3.0
2016-06-14T05:01:50.073
35904
2016-06-14T05:45:57.110
2016-06-14T05:07:30.500
15747
15747
question
word-usage
What is the difference between 原因 and 要因, 解析 and 分析?
From my personal experience,

**「原因」** is like a general cause, perhaps one of many.

```

    「原因は結果の反対語である」 - "The cause is the opposite of the result"
    
```

**「要因」** is the primary cause.

```

    「他の原因はたくさんあったのですが、飲酒運転が要因だったようです。」 
      - "Though there were many other factors, drunk driving seems to have been the primary cause"
    
```

**「解析」** is a word for the process of developing a logical theory about how
something works or how or why something happened by analyzing the information
already available, like when you analyze statistics.

```

    「経済を解析するプロジェクト」 - "a project to analyze the economy"
    
```

**「分析」** is a general word for breaking something up and analyzing its parts
to get more information about it, like you might analyze a meteorite.

```

    「事故の原因はまだ分析しなければなりません」 
      - "(We) still need to analyze the causes of the accident"
    
```
CC BY-SA 3.0
2016-06-14T05:45:57.110
35905
2016-06-14T05:45:57.110
7055
35904
answer