1. Writing: The SP-10 is great for everyday writing, journaling, and note-taking. Its smooth ink flow and comfortable grip make it a pleasure to use.

2. Drawing and Illustration: The pen's archival-quality ink and fine tip (0.5mm or 0.7mm) make it suitable for drawing, illustration, and cartooning.

3. Signing documents: The SP-10's ink is waterproof and lightfast, making it a good choice for signing important documents.

4. Artistic purposes: The pen's vibrant ink colors and blendability make it popular among artists, calligraphers, and lettering enthusiasts.

5. Journaling and Bullet Journaling: The SP-10 is a favorite among journalers and bullet journalists due to its smooth writing experience and variety of color options