Introduction
In Japan, the second Monday of January is Seijin no Hi, Coming of Age Day. Young people who have turned or are about to turn 20 are invited by their town to a ceremony, often in a long-sleeved kimono or a suit, and they meet old classmates again. The legal age of adulthood was lowered to 18 in 2022, but most towns still celebrate those turning 20. For Christian families and churches, it is a moment to thank God for the years that have passed and to pray for what comes next. This page offers 17 messages: from parents, from church friends and the youth group, a few short lines for a text or a card, and longer pieces for a speech or a letter. Adapt them to your relationship, add the person's name and a memory, and send them.
Messages from Parents to a New Adult
A parent's words carry the weight of all the years together. Say your pride and gratitude plainly, and assure them of your prayers.
"Congratulations on turning twenty, [name]. I remember the day you were born as if it were yesterday. You have grown this much because God has kept you. I will keep praying for you, always."
"[name], what a joy to see you celebrate your twentieth year. There were hard days and tears, but you always looked ahead. Dad and Mom are so proud of you."
"Seeing you in your festive clothes filled my heart. I remember the nights we prayed together when you were small. You walk as an adult now, but never forget that God is with you."
"[name], even as an adult, you are always at home here. In joy and in hardship, we are on your side. May God's love surround you wherever you go."
Proverbs 3:5-6
"Trust in Yahweh with all your heart, and don’t lean on your own understanding. In all your ways acknowledge him, and he will make your paths straight."
What parents most want for a child who is leaving is that they keep trusting God along the road. This passage does not promise a particular outcome. It invites us to acknowledge God in all our ways. At the end of a coming-of-age card, it expresses directly the prayer of a father or mother. Read all of Proverbs 3.
Messages from Church and the Youth Group
A note from church touches more when it recalls a moment shared at worship or in service. Older members encourage, and friends of the same age speak simply.
"Congratulations on coming of age, [name]. I have seen you at worship since you were small, and I am moved by the road you have walked. Even as an adult, the church remains your home. Let us keep serving God together."
"[name], the whole church family rejoices in your twentieth year. The times we served together in the youth group are a treasure to me. May God richly bless your life."
"Congratulations! With studies or work, your days will be full, but when you are tired, drop by church whenever you like. Everyone is waiting for you."
"[name], from the heart: the time has come to speak of your faith in your own words. We walk with you in prayer, as your brothers and sisters at church."
1 Timothy 4:12
"Let no man despise your youth; but be an example to those who believe, in word, in your way of life, in love, in spirit, in faith, and in purity."
Paul encourages the young Timothy not to let anyone look down on him because of his age. What matters is to be an example in word, in conduct, in love, in faith and in purity. It is a verse that strengthens a new adult, and it closes a youth group's message very well. Read all of 1 Timothy 4.
Short Lines for a Text or a Card
A few words are enough to say your joy. Here are lines to send by phone or tuck into a card.
"Congratulations on coming of age. May God bless your new start."
"[name], well done! Your photo in festive clothes made me so happy. I am still praying for you."
"Happy twentieth birthday. May God guide each of your steps."
"Welcome to adulthood! If you need anything, write to me whenever you like."
"Well done getting through the ceremony. Was the reunion fun? May God keep you through this day."
Longer Texts for a Speech or a Letter
These are messages to read at a coming-of-age party or to include in a letter. Add a personal memory and speak directly to the young person.
"To all of you entering adulthood: congratulations. From the day you were born until today, God has not forgotten you for a single day. He knows the joys you will meet and the unexpected difficulties too. Do not carry everything alone. Make prayer a habit."
"[name], congratulations on coming of age. Becoming an adult does not mean deciding everything alone. It means taking responsibility for your choices and having the courage to ask for help. Always keep God and your friends close."
"To you who are twenty, here is what I want to say. Your worth does not depend on your grades, your job or what others think. God's love for you is your foundation. Lean on it, and dare to move forward."
"Dear young adults, your life will hold many choices. When you hesitate, open the Bible, and talk with a trusted friend or a pastor. God listens even to the simplest prayers. We are watching over you in prayer."
Joshua 1:9
"Haven’t I commanded you? Be strong and courageous. Don’t be afraid. Don’t be dismayed, for Yahweh your God is with you wherever you go.”"
After Moses, Joshua was to lead the people, and God told him to be strong and courageous. The reason is not his own strength, but the promise that God is with him wherever he goes. It is the ideal verse to read at the end of a speech to young adults heading into a new world. Read all of Joshua 1.
How to Write Your Own Coming of Age Message
Use the name and one specific memory. A line like "you fell asleep during worship when you were little" makes your message unique.
Avoid a lecturing tone. A young adult already thinks for themselves, so write "I hope for you" rather than "you must."
Add your blessing and prayer. Beyond a simple "good luck," add "may God guide you." That is what gives your message its Christian color.
Do not comment on their future in detail. Questions about marriage or careers come better when they bring them up.
Choose a verse that does not weigh heavily. A short text that encourages or invites trust, with its reference, is better than a heavy passage.
Keep your speech brief. Limit yourself to three ideas and end with a prayer. That is what the audience will remember.
Further reading
Frequently Asked Questions
At what age is Coming of Age Day celebrated in Japan?
Since 2022 the legal age of adulthood is 18, but most towns still hold the ceremony for those turning 20. The name may also change, for example to a gathering of twenty-year-olds, so check your town's announcement.
Can I send a message to someone who could not attend the ceremony?
Yes, and it is a very good idea. Some cannot attend because of work, studies or health. A word of congratulations and prayer, by letter or message, will stay in their memory.
What verse should I give a young adult?
Choose a short text that encourages and invites trust rather than a harsh passage. Give the reference, so the person can open their Bible and read it again later.