At least three different types of projectiles can be fired from the Type 98 mortar.
 One is a finned Bangalore Torpedo and two are stick bombs.
 The stick bombs are composed of a hardwood stick 48 mm (1.9 in) diameter that fits into the barrel of the launcher and are reinforced with a metal cap at the bottom to withstand the stress of firing.
 The other end of the stick fits into a flange on the bottom of a rectangular head made from sheet steel and is fastened with nails or screws.
 The head is filled with either a rectangular block picric acid or with black powder.
 Two friction igniters fit into holes in the base of the stick bomb and the cords for these are fastened to either side of the launcher.
 When the mortar is fired the friction igniters are lit and a black-powder delay train starts giving a 7 second delay.
At least three different types of projectiles can be fired from the Type 98 mortar.  One is a finned Bangalore Torpedo and two are stick bombs.  The stick bombs are composed of a hardwood stick 48 mm (1.9 in) diameter that fits into the barrel of the launcher and are reinforced with a metal cap at the bottom to withstand the stress of firing.  The other end of the stick fits into a flange on the bottom of a rectangular head made from sheet steel and is fastened with nails or screws.  The head is filled with either a rectangular block picric acid or with black powder.  Two friction igniters fit into holes in the base of the stick bomb and the cords for these are fastened to either side of the launcher.  When the mortar is fired the friction igniters are lit and a black-powder delay train starts giving a 7 second delay.
Type 98 50 mm mortar