In reply to Large Tip Brush Pen?:
I bought my Pentel Brush in art supplies store in Amsterdam (around the corner from my place there). I have seen it online, where I have also seen other Japanese brushmarkers, eg with larger brushes:
http://www.stationeryart.com/zebra-zebra-fd501-chinese-kanji-calligraphy...
http://www.stationeryart.com/pentel-pentel-japan-chinese-kanji-fude-refi...