-ja

Explanation

1. -ja
A connective ending used to indicate that the preceding action was completed and then the following action occurred successively

2. -ja
A connective ending used to indicate that the preceding content is the cause or motive of the following content.

3. -ja
A connective ending used to indicate that something has two characteristics at the same time.

4. -ja
A connective ending used to imply that however the action or state of the preceding statement came true, it is no good.

5. -ja
A connective ending used when making the following statement on the basis of what one saw or heard.

6. -ja
A connective ending used to indicate that the speaker cannot tolerate a certain situation however hard he/she tries to.