Here is a chart of examples of Japanese word play “goroawase”, which are usually derived from number substitutes for sounds, and act as abbreviations useful in texting or (in the distant past) pagers, or as mnemonic devices for learners. You’ll find them in everyday life once you know what to look for. 4649!

15 x 15 = 225イチゴイチゴに、ニコッいちごいちごににこっichigoichigoni, nikoGrinning at the strawberries.From children's school notes.
33414寂しいよさみしいよSamishiiyoI'm lonely.Used in texting and pagers.
11 x 11 = 121いいいい、人に人いいいい、ひとにひとiiii, hitonihitogood, good, person to personFrom children's school notes.
11 x 11 = 121いいいい、人に人いいいい、ひとにひとiiii, hitonihitoGood, good, person to person.From children's school notes.
12 x 12 = 144胃に胃に石よいにいにいしよiniini, ishiyoFrom stomach to stomach, a rock.From children's school notes.
13 x 13 = 169いざいざ、一郎君いざいざいちろうくんizaiza, ichiroukunIn a pinch, Ichirou.From children's school notes.
14 x 14 = 196いよいよ、一苦労いよいよいくろうiyoiyo, hitokurouFinally, a difficulty.From children's school notes.
16 x 16 = 256色々煮込むいろいろにこむiroiro, nikomuStew various things.From children's school notes.
17 x 17 = 289いいないいな、二泊いいないいなにはくiinaiina, nihakuThat's great, that's cool, two nights!From children's school notes.
18 x 18 = 324いやいや、ミニよいやいやみによiyaiya, miniyoNo, no, it's mini.From children's school notes.
19 x 19 = 361行く行く、寒いとこいくいくあさむいとこikuiku, samuitokoLet's go, let's go, to a cold place.From children's school notes.
物でねーと、せっかくのプレゼントも有り難くない。物でねーと、せっかくのプレゼントも有り難くない。ものでねーと、せっかくのぷれぜんともありがたくないMono de neeto, sekkaku no purezento mo arigatakunai.If not a physical thing, even if you give me a present I'm not happy.Mnemonic to remember the OSI model. Mono (physical) de (data) nee (network), to (t(o)ransport), sekkaku no (session), purezento (presentation), arigatakunai (application).

物理層 データリンク層 ネットワーク層 トランスポート層 セッション層 プレゼンテーション層 アプリケーション層.

0906遅れるおくれるOkureruI’ll be late.Used in texting to say you’ll be late.
3.14159265産医師異国に向こうさんいしいこくにむこSanishi ikokuni mukouObstetrician goes to a foreign land.Mnenomic goroawase students use to remember the first few digits of the constant pi, π.
893ヤクザやくざYakuzaYakuzaMnemonic goroawase for the “Japanese mob”.
0840お早うおはようOhayouGood MorningFor IM or texting, mostly.
0340お寿司◯おすしまるosushi maruI love sushi!License plate. The person must really love sushi!
8888ハハハハははははhahahahaHa ha ha ha!License plate. Laughter, or lucky Chinese New Year?!
6480虫歯ゼロむしばぜろMushiba zeroNo Cavities!Seen as the phone number on some dentist signs.
9182キューティーハーニーきゅーてぃーはーにーKyuutii haaniiCutie HoneyLicense plate. The driver either likes the anime Cutie Honey, or is a cutie honey.
3315さー、さー、行こう!さーさーいこうSaa, saa ikou!Say, let’s go!License plate goroawase, encouraging people to drive, I guess.
4155よい、ゴーゴーよいごうごうYoi, gou gouReady, go, go!Exhortation to “go! go!” for a license plate.
3923さんきゅう日産さんきゅうにっさんsankyuu nissanThank you, NissanNissan lovers, unite!
4946よく読むよくよむyokuyomuRead a lot, oft-read“4946” or yokuyomu (often read), is used in toll free phone numbers for newspapers and magazines. Nikkei even has it in their website -
4649宜しくよろしくYoroshikuBe kind to me“4649” or yoroshiku is used when you are asking someone to do something. This uses both readings of the numeral 4, ‘yon’ and ‘shi’.
1192良い国いいくにiikuniGood Country“1192” or iikuni, is the year the Kamakura bakufu government was established, with the idea of making a good country (ii kuni) .
39さんきゅうさんきゅうsankyuuThank you“39” is used in texting or IM chat, as a quick way to say thank you.
103登山とざんtozanMountain climbing“103” or Oct 3rd is “Mountain Climbing Day”.
1101イトイいといitoiThe “Itoi” of “Itoi Shinbun”If you know Hobonichi techo notebooks you’ll recognize their website as, which has a goroawase for Itoi Shinbun or newspaper.

Nihongo Number Substitutions

The following chart will serve as a key to the goroawase in the above table, showing the possible homophones for numbers in Japanese. Some of them are a bit of a stretch, so one could imagine a situation where the creator of the number play would have to explain how to pronounce it, were it not immediately apparent.

NumberKunyomi RomajiOnyomi RomajiEnglish Transliteration RomajiKunyomi NihongoOnyomi NihongoEnglish Transliteration Nihongo
0maru, ma, warei, reo, zero, zeまる、ま、われい、れオウ、ゼロ、ゼ
1hitotsu, hito, hiichi, iwanひとつ、ひと、ひいち、いワン
2futatsu, fu, futani, jitsu, tsū, tūふたつ、ふた、ふに、じツ、ツー、トゥー
3mitsu, misan, sa, zasu, surīみつ、みさん、さ、ざス、スリー
4yon, yo, yotsushifō, hoよん、よ、よつフォ、ホ
5itsutsu, itsu, igo, kofaibu, faivuいつつ、いつ、いご、こファイブ、ファイヴ
6mutsu, muroku, roshikkusuむつ、むろく、ろシックス
7nana, nanatsu, nashichisebun, sevunななつ、なな、なしちセブン、セヴン
8yatsu, yahachi, ha, baeitoやつ、やはち、は、ばエート
9kokonotsu, kokyu, kunainここのつ、こきゅう、くナイン
10tō, toju, jitenとお、とじゅう、じテン