How to say "splitting" in Japanese

• 分けわけCommon
  noun, noun (suffix)Covers splitting or dividing something into parts in everyday contexts, such as dividing food, work, or space. The most general, everyday choice for physical or informal dividing.
  彼かれらは財産ざいさん分わけのことでもめている。↗

  They are arguing about their share of the property.
• 分配ぶんぱいJLPT N1approx.Common
  noun, suru verb, transitive verbSplitting or dividing something among people — sharing out money, goods, or profits so each person gets a portion. Emphasis on distribution to recipients rather than on the division itself.
  彼かれらは利益りえきを公平こうへいに分配ぶんぱいした。↗

  They allotted the profits fairly.
• 分割ぶんかつCommon
  noun, suru verb, transitive verbSplitting a whole into distinct parts or sections, such as partitioning land, property, or a screen. Suited to more formal or technical division of a single entity.
  クラスが大おおきすぎるので二ふたつのより小ちいさなグループに分割ぶんかつした。↗

  The class was too big so we split up into two smaller groups.
• ガンガンCommon
  adverb (with と), suru verbAn onomatopoeic adverb describing a violent, pounding sensation, as in a splitting headache. It does not mean dividing things; it is the only one of these words for the headache sense.
  まだ頭あたまはがんがんするけど熱ねつはもうないよ。↗

  My head's still pounding but I don't have a temperature any more.

For dividing things use 「分け」 (general), 分配 (sharing out), or 分割 (partitioning); for a splitting headache use the onomatopoeic adverb 「ガンガン」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 分けわけdivision
• 分配ぶんぱいdivision
• 分割ぶんかつpartition
• めりめりcracking
• 割断かつだんcutting (apart)
• がんがんthrobbing (headache)