Translation:
Pen name: Ochinpo Tatsurou
Explanation:

• Ochinpo, pronounced Ochimpo, contains the honorific "o" prefix followed by an informal word for penis.
• Tatsurou: male given name, uses the characters 達 (tatsu, accomplish) and 郎 (rou, used at the end of male given names).

Real name: Tatsuno Saori
Explanation:

• Tatsuno: name of a town, uses characters 辰 (tatsu, dragon from the Chinese zodiac) and 野 (no, field).
• Saori: female given name, uses characters 沙 (sa, sand) and 織 (ori, weave). Both 砂 and 沙 mean sand and can be pronounced sa (or suna or in a few other ways), but 沙 is typically used in women's names and 砂 is normally used in words.