"Jisanbutsu" 持参物 Ji san butsu 当日の持参物はペンとノートです。 The day's bring is a pen and a notebook.

Jisanbutsu じさんぶつ。 持参する it is something that you bring yourself / bring your own 持参物 the item/stuff you bring on your own ハイキングの持参物はお弁当だけです。Only bring your own lunch for the hiking trip. I hope this helps....