Japanese fountain pen nibs can vary from German fountain pen nibs. Watch the video and learn more about the different fountain pen nib sizes.
Three Chinese Extra-Fine Fountain Pens
Japanese flexible nib pen
Kakimori Brass Nib – St. Louis Art Supply
Fountain Pen Nibs: 19 Types Explained (with Examples) - One Pen Show
My personal review of beginner and budget-friendly fountain pens – The Fabulous Scientist
The Cult of Writing Ink & Fountain Pens - Leo Edit
The True Mettle of Japanese Pens
Japanese vs Western Fountain Pen Nibs - The Goulet Pen Company
Fountain Pen Nib Sizes and Grinds - The Goulet Pen Company
Conklin Carbon Fiber Stealth Word Gauge Fountain Pen - Orange
Fountain Pens for Beginners with Tiny Handwriting — Rediscover Analog