Meaning
挿 means to insert, put in, or plug in — the act of deliberately pushing one thing into an opening or gap. Slip a key into a lock. Push a cord into a socket. Press a stem into soil. The physical deliberateness of that motion connects every use of this character.
挿 is built from two components. The left side is 扌, the compressed hand radical (手), marking this as something done with the hands. The right side, 臿, is an ancient form depicting a downward thrust — driving a tool into earth, or a blade into its scabbard. Put them together: a hand forcing something into a tight space.
The Chinese equivalent is 插 (chā in Mandarin), and 挿 is the standard Japanese form on the Jōyō kanji list — the roughly 2,136 characters required for general literacy. It sits at JLPT N1, the top level of the proficiency test. Expect to meet it in formal writing, medical texts, and academic prose rather than casual speech.
At 10 strokes, 挿 is taught at the high school level (grade 8). N1 learners encounter it across many fields: computer menus (data insertion), hospital records (intubation), garden guides (plant propagation), literary criticism (embedded anecdotes), and document editors (inserting figures or images). One kanji, many contexts.
Readings
On'yomi (音読み) — Chinese-derived readings
The on'yomi is ソウ (sō), from the ancient Chinese pronunciation. It is almost exclusively a compound-word reading — not used in isolation. It pairs with other Sino-Japanese characters to form formal academic, medical, and technical vocabulary.
- 挿入 (sōnyū) — insertion; the act of placing something into a space or slot. Appears in computing (「画像を挿入」 = "insert image"), medicine (inserting a device), and document editing.
- 挿話 (sōwa) — episode, anecdote; a short story or digression embedded within a longer narrative. Common in literary criticism and storytelling analysis.
- 挿管 (sōkan) — intubation; inserting a tube into a patient's airway or digestive tract. A critical term in emergency medicine and clinical care.
- 挿図 (sōzu) — illustration or diagram inserted into the body of a text.
Among these, 挿入 is the one to prioritize. It appears on word processors' Insert menus, in hospital records, and in academic footnotes. Formal register, broad application.
Kun'yomi (訓読み) — Native Japanese readings
The kun'yomi is さ.す (sa.su), the native Japanese verb. The dot marks where okurigana begins — the ending changes with conjugation: さして (gerund), さした (past), さしこむ (push all the way in).
- 挿絵 (sashie) — illustration; a picture inserted into a book or article to complement the text. Formed from さし (insertion) + 絵 (picture).
- 挿し木 (sashiki) — plant cutting; a stem inserted into soil to grow a new plant. A fundamental gardening technique.
- 挿し込む (sashikomu) — to plug in, to insert fully into a slot. Combining 挿す with 込む (to go inside) emphasizes that the object goes all the way in.
- 挿し花 (sashibana) — decorative flower arrangement; inserting flowers into a vessel.
さす is the everyday spoken form. Plugging in a charger, inserting a key, dropping flower stems into water — these are さす situations. The さ stays fixed; only the ending shifts.
Common Words & Compounds
挿 spans everyday tasks, gardening, literature, and medicine. These compounds are grouped by domain to help each one stick.
General and everyday use:
挿入 (sōnyū) — insertion; the most common compound, used in documents, computers, and medicine
挿絵 (sashie) — illustration inserted into a book or article
挿し込む (sashikomu) — to plug in, to push something fully into a slot
挿す (sasu) — the base verb: to insert, to put in, to plug in ### Gardening and nature:
挿し木 (sashiki) — plant cutting; propagating plants by inserting stems into soil
挿し芽 (sashime) — shoot cutting; using young tender shoots rather than woody stems
挿し花 (sashibana) — decorative flower arrangement
Literature and media:
- 挿話 (sōwa) — anecdote or episode embedded within a larger narrative
- 挿図 (sōzu) — illustration or diagram inserted into a text
Medicine and science:
- 挿管 (sōkan) — intubation; inserting a breathing or feeding tube into a patient
Expressive verb patterns:
- 挿し挟む (sashihasamu) — to interpose, to insert between two things; used figuratively for interjecting a remark into a conversation
挿入 is the compound you'll encounter most. It's on every word processor's Insert menu (「画像を挿入」), in medical reports, and throughout academic writing. If you learn only one word from this kanji, make it this one.
Example Sentences
写真を文書に挿入してください。
Shashin wo bunsho ni sōnyū shite kudasai.
Please insert the photo into the document.
鍵を鍵穴に挿してドアを開けた。
Kagi wo kagiana ni sashite doa wo aketa.
I slid the key into the lock and opened the door.
この本の挿絵はとても美しい。
Kono hon no sashie wa totemo utsukushii.
The illustrations in this book are stunning.
プラグをコンセントに挿し込んだ。
Puragu wo konsento ni sashikonda.
I plugged it into the outlet.
医師は患者の気道に挿管した。
Ishi wa kanja no kidō ni sōkan shita.
The doctor intubated the patient's airway.
彼女は会話の途中に鋭いコメントを挿入した。
Kanojo wa kaiwa no tochū ni surudoi komento wo sōnyū shita.
She cut in with a sharp remark mid-conversation.
庭に挿し木でバラを増やした。
Niwa ni sashiki de bara wo fuyashita.
I propagated roses in the garden from cuttings.
小説の中に面白い挿話が含まれていた。
Shōsetsu no naka ni omoshiroi sōwa ga fukumarete ita.
The novel had an entertaining anecdote woven into it.
USBメモリをパソコンに挿し込んでデータを保存した。
USB memori wo pasokon ni sashikonde dēta wo hozon shita.
I plugged the USB drive into the computer and saved the file.
Memory Tip
Picture a hand (the 扌 radical) gripping a narrow tool and driving it firmly downward into a tight opening — thrusting a stake into the ground, pushing a sword into its scabbard. The right half, 臿, reinforces that image: an object directed downward into a gap. Plug in a USB drive, insert a key, place a flower stem in a vase, drop an image into a document — you are performing 挿 every time.