At a glanceKnown key applied · partial (90% of the cipher)
- The telegrams
- Two telegrams of 8 November 1874 from the Army Ministry, to a garrison and to the garrisons, and one of 22 October 1874 from Major Ōnuma at Nagasaki to Yamagata, all on the negotiations with China after the Taiwan expedition.
- Where
- National Institute for Defense Studies, Army Ministry records, via JACAR: C04025783900, C04025783500 with C04025783600, and C10071951300. Not in DECODE or the catalogue.
- The cipher
- Two digits from 1 to 7 give the row and column of a kana in a 7 x 7 square holding the iroha in its seven-per-line layout; the last two cells are the voicing marks.
- How it was read
- The square was the contributor's first hypothesis and was then checked on a held-out telegram. It is Satoshi Tomokiyo's table meijiarmy1, already described by Nagata (1989), Ohno (2010) and Tomokiyo (2014).
- What it says
- Telegram 1: 支那談判平穏ニ相済ミ, "the negotiations with China have been concluded peacefully", and China will pay an indemnity.
- Credit
- Telegrams 1 and 2 first deciphered by Ohno Tetsuya (2010); key described by Nagata Junkō, Ohno and Satoshi Tomokiyo; re-reading of 1-2 and first known reading of 3 (not in Ohno 2010) by Brice Dudout with Claude agents; Satoshi Tomokiyo read the continuation of telegram 2 and confirmed two readings in telegram 3.
- Still open
- One unresolved group and one restored word in telegram 2; one unresolved group and four restored words in telegram 3; no word-by-word comparison with Ohno's article yet.
01 The three telegrams
| Telegram | JACAR | Date | First deciphered | Here |
|---|---|---|---|---|
| 1 | C04025783900, frames 1819–1820 | 8 Nov 1874, Army Ministry to a garrison | Ohno 2010 (his no. 4031) | re-read, 20/20 words |
| 2 | C04025783500 frame 1811 + C04025783600 frame 1812 | 8 Nov 1874, Army Ministry to the garrisons | Ohno 2010 (his no. 4027); frame 1812 also read by Tomokiyo | re-read, 27/29 words |
| 3 | C10071951300, frames 0712–0713 | 22 Oct 1874, Major Ōnuma, Nagasaki, to Yamagata | none known | first known reading (not in Ohno 2010), 18/23 words |
No images are shown: the contributor withheld the JACAR frames, which JACAR marks "All rights reserved". All three telegrams are in the same key. Frame 1813 of C04025783600 does not read with it; it is probably Ohno's no. 4028, in the meijiarmy4 table of 30 October 1874, which Satoshi Tomokiyo has deciphered, and it is not part of this page. The Army's numeric kana ciphers of 1901–04 are a different system, with their own pages (army1901, army1902).
02 The key and its check
Each pair (row, column) points into a 7 x 7 square filled with the iroha seven kana to a line: いろはにほへと / ちりぬるをわか / よたれそつねな / らむうゐのおく / やまけふこえて / あさきゆめみし / ゑひもせす, with 76 for the dakuten and 77 for the handakuten, enciphered as separate signs (ダンパン = タ゛ム ハ゜ム). ム also stands for ン. The contributor wrote this down as the a-priori hypothesis of his protocol on 28 October 2026, before he knew of the earlier works; only cells 76 and 77 were fixed on telegram 1. With key and transcription frozen, the square read the 63 pairs of telegram 2 (frame 1811, held out) as 支那ノ談判既ニ破レタル趣 … 尚確報; none of 200 random permutations of the 49 cells came near it (trigram score -5.03 vs at best -5.30; 11 lexicon hits vs at best 2). Since the key is published, this checks the transcription and reading, not a discovery.
03 Telegram 1
支那談判平穏ニ相済ミ、支那政府ヨリ償金ヲ出ス筈ニ約定成シ{タ}ル趣、唯今電報ヲ得タリ。
"The negotiations with China have been concluded peacefully; it has been agreed that the Chinese government will pay an indemnity. We have just received the telegram." 20 words: 19 certain, one probable ({成シタル}: the pair is written 33, レ, and read 32, タ, the only grammatical form).
04 Telegram 2
支那ノ談判{既ニ}破レタル趣、諸新聞紙ニ記載シアレドモ、未ダ政府{エ}ハ報知‹ケ›ナシ、尚確報アラバ[速ヤカニ]{申シ}{達ス}ベキニ付キ、浮説等信用スベカラズ。
"The rumour that the negotiations with China have already broken down is reported in the newspapers, but the government has as yet received no word of it; as soon as there is sure news it will be passed on without delay, so give no credence to rumours." Frame 1811 stops at 尚確報 and frame 1812, filed in the next JACAR item, goes on with アラバ and carries the date and signature. 29 words: 23 certain, 4 probable, 1 restored, 1 unresolved.
05 Telegram 3
[品川領事コレニ二十日ノ電報ニ曰ク、]{現今}北京ヨリ[書翰ヲ]{落手}[セリ]、支那{政府}ヨリ大久保全権‹…›{ニ}[本月][二十日]マデニ{返答}スベシ、其ノ上ニ{引払}[ルナルベシ]
"Consul Shinagawa says in his telegram of the 20th: I have just received a letter from Beijing: the Chinese government […] to Plenipotentiary Ōkubo […] must answer by the 20th of this month; after which he will probably withdraw." Cipher and clear text are mixed (first bracket = clear text). 23 cipher words: 12 certain, 6 probable, 4 restored, 1 unresolved. The restored words depend on two declared corrections of the cipher clerk (a blotted 3 and a stray 7, both seen on the image by Brice Dudout). Satoshi Tomokiyo confirmed two readings, キ and ソ.
06 Still open
- Telegram 2: pair 53 (ケ) in 報知‹ケ›ナシ gives no word, probably the clerk's slip; [速ヤカニ] restored from a single 6 where 66 is needed.
- Telegram 3: the group リシム unresolved; four restored words resting on the two clerk corrections.
- Ohno's article was not seen directly (its content was reported by Satoshi Tomokiyo), so the readings of telegrams 1 and 2 have not been compared with his word by word.
Full texts
The transcription and the decryption of every document on this page, so that the reading can be used and checked. Short files are shown here; all are in the repository.
Army Ministry telegram, 8 Nov 1874
The China negotiations ended peacefully; China agreed to pay an indemnity (Taiwan expedition, Beijing agreement of 31 Oct 1874). First deciphered by Ohno (2010, no. 4031); re-read here.
Transcription
# JACAR C04025783900, frames 1819-1820 (National Institute for Defense Studies, Army Ministry records). Images not included (JACAR: all rights reserved). # Army Ministry -> garrison (chindai), 8 Nov 1874 (Meiji 7.11.8). 65 pairs of digits 1-7, written in kanji numerals, separated by commas, 7 pairs per column. # Pair 49 is written 33 on the image; read 32 by sense (see reading.md). 67 37 32 76 42 13 77 42 16 11 25 42 14 61 11 75 66 67 37 74 11 54 31 22 67 31 43 63 42 25 11 32 76 75 13 35 76 14 51 47 57 76 43 37 67 33 24 25 73 42 63 32 32 76 11 52 57 76 42 15 43 25 71 32 22
Decryption
# Pair by pair with the iroha 7x7 square (row, column). 76 = dakuten, 77 = handakuten (separate signs). 67 37 32 76 42 13 77 シ ナ タ ゛ ム ハ ゜ 42 16 11 25 42 14 61 ム ヘ イ ヲ ム ニ ア 11 75 66 67 37 74 11 イ ス ミ シ ナ セ イ 54 31 22 67 31 43 63 フ ヨ リ シ ヨ ウ キ 42 25 11 32 76 75 13 ム ヲ イ タ ゛ ス ハ 35 76 14 51 47 57 76 ツ ゛ ニ ヤ ク テ ゛ 43 37 67 33 24 25 73 ウ ナ シ レ ル ヲ モ 42 63 32 32 76 11 52 ム キ タ タ ゛ イ マ 57 76 42 15 43 25 71 テ ゛ ム ホ ウ ヲ ヱ 32 22 タ リ # continuous: シナタ゛ムハ゜ムヘイヲムニアイスミシナセイフヨリシヨウキムヲイタ゛スハツ゛ニヤクテ゛ウナシレルヲモムキタタ゛イマテ゛ムホウヲヱタリ
Reading
# Established text (Japanese, katakana telegram style)
First deciphered by Ohno Tetsuya (2010, his no. 4031). This is an independent re-reading, made before we knew of his article.
シナダンパン ヘイヲンニ アイスミ、シナセイフヨリ シヤウキンヲ イダス ハヅニ ヤクヂヤウ ナシ{タ}ル ヲモムキ、タダイマ デンポウヲ ヱタリ。
支那談判平穏ニ相済ミ、支那政府ヨリ償金ヲ出ス筈ニ約定成シ{タ}ル趣、唯今電報ヲ得タリ。
(As enciphered: シナタ゛ムハ゜ム ヘイヲムニ アイスミ シナセイフヨリ シヨウキムヲ イタ゛ス ハツ゛ニ ヤクテ゛ウ ナシ{タ}ル ヲモムキ タタ゛イマ テ゛ムホウヲ ヱタリ; ム written for ン, voicing marks as separate cells.)
## State of the reading (Daniel Bourdeau's rule: 95% of words read in their sense)
20 words (支那/談判/平穏/ニ/相済ミ/支那/政府/ヨリ/償金/ヲ/出ス/筈/ニ/約定/成シタル/趣/唯今/電報/ヲ/得タリ): 19 certain (95%), 1 probable {成シタル} (5%), 0 restored by sense, 0 unresolved. Read in their sense: 20/20 (100%).
## Justification
- {成シタル}: pair 49 is written 三三 (= レ, giving ナシレル); 三二 (= タ) gives ナシタル, the only grammatical form. 二 and 三 are hard to tell apart in columns of stacked strokes.Translation
# English translation "The negotiations with China have been concluded peacefully; it has been agreed that the Chinese government will pay an indemnity. We have just received the telegram." Context: end of the 1874 Taiwan expedition. The Beijing agreement of 31 Oct 1874 (Okubo Toshimichi; the British minister Thomas Wade mediating) granted Japan an indemnity of 500,000 taels.
Army Ministry telegram, 8 Nov 1874 (break-off rumour denied) read in part
Newspapers report that the China negotiations have broken down, but the government has no word; sure news will follow; give no credence to rumours. 27/29 words certain or probable. First deciphered by Ohno (2010, no. 4027); continuation also read by Satoshi Tomokiyo.
Builds coherent sentences, but under the read bar of 95% of words read as sense (93% here); the holes are marked in the reading.
Transcription
# JACAR C04025783500, frame 1811, continued on JACAR C04025783600, frame 1812 (last 6 rows; date 8 Nov 1874 and Army Ministry signature). Cursive hand; images not included. # "6+" = a single 6 on the copy where 66 (ミ) is needed (confirmed single sign by Brice Dudout): one digit restored. # Cursive 2/3 (zeta-shaped) and doubtful groups settled by three targeted visual reviews by Brice Dudout (shapes only, plates C02, C03, C09). 67 37 45 32 76 42 13 77 42 75 57 67 14 51 54 33 32 24 25 73 42 63 67 31 67 42 54 76 42 67 14 63 62 11 67 61 33 17 76 73 11 52 32 76 74 11 54 56 13 15 43 21 53 37 67 37 15 47 26 47 15 43 61 41 13 76 75 6+ 51 27 14 52 43 67 32 35 75 16 76 63 14 35 63 54 74 35 17 43 67 42 31 43 75 16 76 27 41 75 76
Decryption
# Pair by pair, same key as key.tsv. 67 37 45 32 76 42 13 シ ナ ノ タ ゛ ム ハ 77 42 75 57 67 14 51 ゜ ム ス テ シ ニ ヤ 54 33 32 24 25 73 42 フ レ タ ル ヲ モ ム 63 67 31 67 42 54 76 キ シ ヨ シ ム フ ゛ 42 67 14 63 62 11 67 ム シ ニ キ サ イ シ 61 33 17 76 73 11 52 ア レ ト ゛ モ イ マ 32 76 74 11 54 56 13 タ ゛ セ イ フ エ ハ 15 43 21 53 37 67 ホ ウ チ ケ ナ シ 37 15 47 26 47 15 43 ナ ホ ク ワ ク ホ ウ 61 41 13 76 75 6+ 51 ア ラ ハ ゛ ス ミ[restored] ヤ 27 14 52 43 67 32 35 カ ニ マ ウ シ タ ツ 75 16 76 63 14 35 63 ス ヘ ゛ キ ニ ツ キ 54 74 35 17 43 67 42 フ セ ツ ト ウ シ ム 31 43 75 16 76 27 41 ヨ ウ ス ヘ ゛ カ ラ 75 76 ス ゛
Reading
# Established text, telegram 2 (JACAR C04025783500 frame 1811 + C04025783600 frame 1812), 8 Nov 1874
First deciphered by Ohno Tetsuya (2010, his no. 4027). The continuation on C04025783600 frame 1812 was also read by Satoshi Tomokiyo (personal communication, 30 Oct 2026). This is an independent re-reading, made before we knew of these readings.
支那ノ談判{既ニ}破レタル趣、諸新聞紙ニ記載シアレドモ、未ダ政府{エ}ハ報知‹ケ›ナシ、尚確報アラバ[速ヤカニ]{申シ}{達ス}ベキニ付キ、浮説等信用スベカラズ。
## State of the reading (Daniel Bourdeau's rule: 95% of words read in their sense)
29 words: 23 certain, 4 probable ({既ニ}, {エ}, {申シ}, {達ス}), 1 restored by sense ([速ヤカニ]), 1 unresolved ‹ケ› → 27/29 = 93.1% (28/29 = 96.6% with the restored word).
## Justifications
- Frames 1811 and 1812 run on: 1811 stops at 尚確報, 1812 (filed by JACAR in the next item) resumes with アラバ and bears the date and signature.
- {既ニ}: 67 written for 76 (transposition by the clerk). {エ}: pair 56; エ is a common phonetic spelling of the particle ヘ. {申シ}, {達ス}: one cursive 2/3 digit each read by sense (43, 35), not reviewed.
- [速ヤカニ]: a single 6 on the copy where スミヤカニ needs 66 (Brice Dudout confirms a single sign, plate C09 q11): one digit restored.
- ‹ケ›: pair 53 in 報知‹ケ›ナシ, probably the clerk's slip.
- Targeted reviews by Brice Dudout (shapes only, no plaintext shown): plate C02 10/10; plate C03 3/3 controls; plate C09 all 10 shape answers agree with the reading by sense (control included; in q03 the frame took in two signs, a plate error, and Brice read both correctly).Translation
# English translation, telegram 2 (8 Nov 1874) "The rumour that the negotiations with China have already broken down is reported in all the newspapers, but the government has as yet received no word of it; as soon as there is sure news it will be passed on to you without delay, so give no credence to rumours." On the same day telegram 1 announces the agreement.
Major Onuma, Nagasaki, 22 Oct 1874 (relaying consul Shinagawa) read in part
Letter from Beijing: Okubo ... the Chinese must answer by the 20th; then he will probably withdraw. 18/23 words certain or probable (22/23 with restored words that depend on two declared clerk corrections). Not in Ohno 2010.
Builds coherent sentences, but under the read bar of 95% of words read as sense (78% here); the holes are marked in the reading.
Transcription
# JACAR C10071951300, frames 0712-0713: Major Onuma (Nagasaki) to Army Minister Yamagata, sent 22 Oct 1874 10:15, received 23 Oct 01:10, relaying consul Shinagawa (Shanghai) of the 20th. Images not included. # Digits 1-7 without commas, written as kanji numerals; runs of 一/二/三 segmented with two targeted digit-count reviews by Brice Dudout. # Column 2 "二" read 一一 by sense. (3) and (7) = digits present on the image (confirmed by Brice) and set aside as cipher-clerk errors. clear: シナカハリヨウジコレニジユニチノデンポウニイフ、 cipher: 5 3 4 2 5 5 4 2 1 5 3 5 6 3 4 2 3 1 2 2 clear: シ?ヨカン?ヲ、 (read レヨカヒヲ on the copy) cipher: 4 1 4 7 6 7 clear: セリ cipher: 6 7 3 7 7 4 1 1 5 4 3 1 2 2 4 6 1 5 4 7 1 5 7 4 4 2 5 3 4 2 cipher: (3) 2 2 6 7 4 2 1 4 1 5 4 2 5 3 3 5 1 3 3 5 2 7 5 2 5 7 1 4 1 6 4 2 1 7 5 4 7 5 1 6 6 7 3 4 4 5 cipher: 4 3 1 6 1 4 7 2 6 3 1 3+dakuten 4 1 (7) 2 4 3 7 2 4 1 6 6 7
Decryption
# Pairs with the key in key.tsv; bracketed digits removed before pairing. [clear] シナカハリヨウジコレニジユニチノデンポウニイフ、 5 3 4 2 5 5 4 2 1 5 3 5 6 3 4 2 3 1 2 2 ケ ム コ ム ホ ツ キ ム ヨ リ [clear] シ?ヨカン?ヲ、 (read レヨカヒヲ on the copy) 4 1 4 7 6 7 ラ ク シ [clear] セリ 6 7 3 7 7 4 1 1 5 4 3 1 2 2 4 6 1 5 4 7 1 5 7 4 4 2 5 3 4 2 シ ナ セ イ フ ヨ リ オ ホ ク ホ セ ム ケ ム (3) 2 2 6 7 4 2 1 4 1 5 4 2 5 3 3 5 1 3 3 5 2 7 5 2 5 7 1 4 1 6 4 2 1 7 5 4 7 5 1 6 6 7 3 4 4 5 リ シ ム ニ ホ ム ケ ツ ハ ツ カ マ テ ニ ヘ ム ト フ ス ヘ シ ソ ノ 4 3 1 6 1 4 7 2 6 3 1 3+dakuten 4 1 (7) 2 4 3 7 2 4 1 6 6 7 ウ ヘ ニ ヒ キ ハ ラ ル ナ ル ヘ シ
Reading
# Established text, telegram 3 (JACAR C10071951300)
[品川領事コレニ二十日ノ電報ニ曰ク、]{現今}北京ヨリ[書翰ヲ]{落手}[セリ]、支那{政府}ヨリ大久保全権‹…›{ニ}[本月][二十日]マデニ{返答}スベシ、其ノ上ニ{引払}[ルナルベシ]
(First bracket = clear text of the telegram.)
Not in Ohno Tetsuya (2010), which cites C04025783500 and C04025783900 only: to our knowledge the first reading of this telegram. Satoshi Tomokiyo confirmed two of our readings in it, 6[3] = キ and [3?]4 = ソ (personal communication, 30 Oct 2026).
## State of the reading (Daniel Bourdeau's rule: 95% of words read in their sense), cipher part
23 words: 12 certain, 6 probable ({現今}, {落手}, {政府}, {ニ}, {返答}, {引払ル}), 4 restored by sense ([本月], [二十日], [ナル], [ベシ]), 1 unresolved (‹リシム›). Read: 18/23 = 78.3% (22/23 = 95.7% with the restored words). Strict reading without the two declared corrections: about 77% (17/22).
## Two declared corrections
1. First digit of column 1 (page 1), a blotted 3: present on the image (confirmed by Brice Dudout, plate C07), set aside; the column then reads ホムケツ ハツカ (本月二十日).
2. The 7 of "1 7" in column B (page 2): present on the image (confirmed by Brice, plate C07), set aside; the end then reads ヒキバラ ル ナル ベシ.
Same clerk: in telegram 2 he writes 67 for 76 (transposition).
## Justifications
- {現今} ケムコム; {落手} ラクシ with ユ omitted; {政府} column-2 二 = 一一; {返答} written ヘムトフ; {引払ル} ヒキバラ ル.
- Brice's reviews: plate C05 (12 zones: 8 agreements, 3 corrections of the transcription, 1 discrepancy decided by sense); plate C07 (head of column 1 and end of column B confirmed). Control q10 of C07 was inconclusive because the plate's frame was about 20 px too high (it included the stroke of the 5 above); Brice's digit sequence was correct.Translation
# English translation, telegram 3 (JACAR C10071951300) "Consul Shinagawa says in his telegram of the 20th: I have just received a letter from Beijing: the Chinese government [...] to Plenipotentiary Okubo [...] must answer by the 20th of this month; after which he will probably withdraw." Okubo was threatening to break off and leave Beijing; the agreement was signed on 31 Oct 1874.
Key: key.tsv
07 Sources
- JACAR (Japan Center for Asian Historical Records), National Institute for Defense Studies: C04025783900, C04025783500, C04025783600, C10071951300.
- 大野哲弥 Ohno Tetsuya, 「明治7年の陸軍省暗号の制定:佐賀の乱後の陸軍暗号電報利用状況」, 情報化社会・メディア研究 7 (2010), pp. 37–44.
- 長田順行 Nagata Junkō, 『西南の役と暗号』 (1989), p. 170.
- Satoshi Tomokiyo, Cryptiana, meijiarmy.htm (2014), table meijiarmy1.
- Brice Dudout, L'Europe chiffrée, Meiji 1874; pull request #386.
Transcriptions, decryptions, readings, translations and the key are in targets/meiji1874/.
Cite this page
Daniel Bourdeau, Brice Dudout and Satoshi Tomokiyo, “Meiji Army telegrams of 1874, the 1–7 coordinate square”, Cyphersolver, posted 11 November 2026, https://cyphersolver.com/meiji1874.html.