This observation is not new or unique to Nodame, but still: Japanese sure like their 2+2 syllable shortenings.

Examples include:

• ジミヘン / "jimi hen": Jimi Nendrix, made in the same way as Kane-tomo refers to Tomoko Kaneda.
• セクハラ / "seku hara": Seksual Harassement, see the picture above.
• コンマす / "kon masu": Concert Master, or concertmeister — the job of the first violin.

UPDATE: Hikago points to a related entry Peter Payne's J-list Side Blog.