お食い初めとは？

お食い初めとは｜意味と由来

Okuizome is a cherished Japanese ceremonial tradition performed approximately one hundred days after a child’s birth, during which family members symbolically feed the infant for the first time to express the heartfelt wish that the child will never experience hunger throughout their lifetime. The ceremony’s name literally translates to first eating, though the baby does not actually consume any food during the ritual, as the dishes are merely touched to the infant’s lips with ceremonial chopsticks wielded by the eldest family member present. This practice reflects the deeply held Japanese cultural belief that proper ceremonial observance at key developmental milestones provides spiritual protection and blessings that guide the child through a prosperous and healthy life. The tradition encompasses multiple symbolic elements including specially prepared foods, gender-specific lacquerware, and the hagataishi tooth-hardening stone ritual, each contributing layers of meaning that connect the newborn to centuries of Japanese cultural heritage and express the family’s collective aspirations for the child’s future wellbeing.

お食い初め（おくいぞめ）とは、生後100日前後の赤ちゃんに「一生食べ物に困らないように」と願いを込めて行う日本の伝統行事です。平安時代に贵族の間で始まったとされ、当時は「祈い膊（いわいばし）」や「算揃え（はしそろえ）」とも呼ばれていました。

生後100日目に行うことから「百日（ももか）祝い」とも呼ばれます。この時期は赤ちゃんに乳歯が生え始める頃であり、歯が生えたことを喜び、これからの食べ物に困らない人生を願う意味があります。

お食い初めの歴史｜平安時代から現代まで

The historical origins of okuizome trace back to the Heian period of Japanese history, approximately one thousand years ago, when aristocratic court families established elaborate ceremonial practices surrounding infant development milestones that gradually spread throughout Japanese society over subsequent centuries. During the Heian era, the ceremony was initially known as momoka no iwai or hundredth day celebration, and was primarily observed among nobility who possessed the resources to prepare formal ceremonial meals with precious lacquerware and seasonal delicacies. The Muromachi period saw the tradition expand beyond aristocratic circles into samurai households, where it merged with warrior-class values emphasizing strength, endurance, and family honor through the addition of the hagataishi stone ritual. By the Edo period, okuizome had become firmly established as a common practice across all social classes, with regional variations developing throughout Japan that reflected local ingredients, customs, and aesthetic sensibilities. The modern incarnation of the ceremony preserves these accumulated historical layers while adapting to contemporary family structures and lifestyles.

約1,000年の歴史を持つお食い初めは、時代とともに形を変えながらも、「子どもの健やかな成長を願う」という根本の思いは変わっていません。

お食い初めを行う時期と参加者

The traditional timing for okuizome centers on the hundredth day after the infant’s birth, though considerable flexibility exists in actual practice, with many families scheduling the ceremony anywhere from the ninety-fifth to the hundred-and-twentieth day to accommodate weekend availability and guest schedules. The selection of participants follows established conventions that honor the Japanese extended family structure, with both sets of grandparents traditionally invited alongside the parents and infant as core ceremony attendees. The role of yashinae-oya, the ceremonial feeding elder, is customarily assigned to the oldest family member of the same gender as the baby, reflecting the cultural belief that proximity to longevity transfers blessings of long life to the child. Contemporary celebrations frequently expand the guest list to include close aunts, uncles, and family friends, transforming the intimate ritual into a broader family gathering that strengthens social bonds across generations while maintaining the ceremony’s essential symbolic elements.

お食い初めは生後100日目（生まれた日を1日目として数える）に行うのが基本ですが、地域によっては110日目や120日目に行うこともあります。厳密な日付よりも、赤ちゃんの体調や家族の都合を優先して日程を決めましょう。

参加者は、赤ちゃんとパパ・ママ、そして両家の祖父母が揃うのが理想ですが、必ずしも全員が揃う必要はありません。パパとママと赤ちゃんの3人だけで行う家庭も増えています。

お食い初めで準備するもの

Comprehensive preparation for an okuizome ceremony encompasses three primary categories of items: ceremonial tableware appropriate for the infant’s gender, a complete ichiju-sansai meal with symbolic significance, and supplementary ritual elements including hagataishi stones and decorative accessories. The tableware traditionally consists of six lacquerware pieces in gender-specific colors, vermilion for boys and black exterior with vermilion interior for girls, arranged on a ceremonial tray according to formal Japanese dining placement conventions. The ceremonial meal requires a whole tai sea bream as the auspicious centerpiece, accompanied by sekihan celebratory red rice, osumashi clear soup with hamaguri clams, nimono simmered seasonal vegetables, and tsukemono pickled preparations that complete the traditional one-soup-three-dishes format. Additional preparation elements include selecting and purifying hagataishi stones, arranging appropriate attire for the baby typically a formal white or celebratory garment, and coordinating photography to document this irreplaceable family milestone for future reminiscence.

お食い初めに必要なものは主に以下の4つです。

① 食器（祈り膳）：正式には漆塗りのお膳セットを使います。男の子は内外とも朱塗り、女の子は外側が黒・内側が赤の漆器が伝統的です。現代では木製やベビー食器で代用する家庭も多いです。

② 料理（一汁三菜）：鯛の尾頭付き・赤飯・お吸い物（蛤）・煮物（筑前煮）・香の物（漬物）の5品が基本です。それぞれに「長寿」「魔除け」「子孫繁栄」などの願いが込められています。

③ 歯固め石：「丈夫な歯が生えますように」という願いを込めて、丸くて滑らかな小石を1〜3個用意します。神社で借りるのが正式です。

④ 祈い算：柳の木で作られた両口算を使います。片方は神様用、もう片方は赤ちゃん用とされています。

お食い初め当日の流れ

The okuizome ceremony follows a structured procedural sequence that begins with the formal seating arrangement of all participants and culminates in the symbolic feeding ritual performed by the designated elder family member. The ceremony opens with a brief acknowledgment of the occasion’s significance, followed by the presentation of the carefully arranged ceremonial meal before the infant, allowing all guests to appreciate the visual beauty and symbolic meaning of each dish. The feeding ritual proceeds in a specific order, with the elder touching chopsticks to each dish and then gently pressing them to the baby’s lips in a prescribed sequence that typically follows the pattern of rice, soup, rice, fish, rice, soup repeated three times. The hagataishi stone ritual follows, where the chopsticks touch the stone and then the baby’s gums to symbolically transfer the stone’s enduring hardness to the child’s developing teeth. The ceremony concludes with a celebratory toast and communal meal where adult participants enjoy the prepared dishes together in a festive atmosphere.

お食い初め当日の基本的な流れは次の通りです。

参考文献・出典

• 文化庁「民俗文化財」
• 厚生労働省「子ども・子育て支援」
• 農林水産省「食育の推進」

本記事の内容は、上記の公的機関の情報および日本の伝統行事に関する文献を参考に、「日本の行事」編集部が独自に調査・編集したものです。

お食い初めに関するよくある質問

New parents approaching their first okuizome ceremony naturally have numerous questions about proper procedure, acceptable adaptations, and the relative importance of various ceremonial elements, reflecting the challenge of preserving meaningful traditions within the context of busy modern family life. Common inquiries address whether the ceremony must be performed exactly on the hundredth day, what to do if grandparents cannot attend in person, whether restaurant ceremonies carry equal cultural validity to home celebrations, and how to handle situations where the baby becomes fussy during the ritual. Cultural experts and experienced parents consistently advise that the ceremony should be a source of joy rather than stress, encouraging families to focus on the emotional warmth and familial connection that define the celebration’s true purpose rather than achieving technical perfection in every ceremonial detail. This balanced perspective helps new parents approach the milestone with confidence and authentic enthusiasm.

Q. お食い初めは必ずやらないといけないの？

A. お食い初めは義務ではなく、やらない家庭もあります。ただし、赤ちゃんの成長を家族で祝う良い機会ですので、簡単な形でも行うことをおすすめします。

Q. お食い初めの費用はどのくらい？

A. 自宅で手作りする場合は5,000〜15,000円、レストランや料亭で行う場合は1人5,000〜10,000円が相場です。通販のお食い初めセットは8,000〜15,000円程度です。

Q. お食い初めとお宮参りの違いは？

A. お宮参りは生後30日前後に神社で赤ちゃんの誕生を報告する行事で、お食い初めは生後100日前後に食べ物に困らないことを願う儀式です。時期も目的も異なりますが、最近は同日にまとめて行う家庭も増えています。