Misc. Japanese 計算尺 Slide Rule Gallery This gallery is dedicated to Japanese slide rules and manufacturers. (Manufacturers not found in their own gallery).

KEEP ISRM FREE!

Toyo	Toyo Specialized Business Development Co. Toyo Tokusen-Kogyo Kabusiki-Kaisha Seizou
P120 Toyo w/ Bamboo Cursor REF Toyo w/ Bamboo Cursor (appeared on eBay)	Toyo w/ Bamboo Cursor- c1940-1945 Made in Japan - Manufacturer Presumed to be Relay Front Scale A, [ B, CI, C ] D Back Slider: [ S, L, T ] Archive - no longer in collection Someone in Japan, Prior to, or during WWII provided this with a  bamboo cursor frame. It was given to a young American business woman, now a grand mother, as a gift by a Japanese visitor, prior to WWII. The company name is in the insert. At first I thought this was a one-of-a-kind, possibly a homemade cursor frame, but another showed up as being in Ed Chamberlain's collection, when he put it on eBay (sold for $100). My conclusion is that due to a shortage of steel the company (Toyo) that handed out these slide rules as a promotional item, made these useful with the bamboo frame. This specimens has the 'equivalents' sheet on the back. Mika (Mickey) Shingo in Aichi, Japan translates the Japanese characters  as:  "Toyo Tokusen-Kogyo Kabusiki-Kaisha Seizou" which means, "Produced by Toyo Specialized Business Development Co., Inc." "Specialized Business Development" implies that this company's business was related to Japanese government (before 1945).
S316 Relay 150	S316 Relay 150 - c1940-1945 Made in Japan - Pre-1945 Relay - missing cursor Front Scale (extended) 25cm // K, A, [ B, CI, C ] D, L || 10in Back Scale: [ S, S&T, T ] Equivalents I found this one that looks like the same company name (see insert) as my P120 above. This tells me that both slide rules must be made by Relay since the Japanese companies were very brand loyal and the distributor would not have used multiple competing suppliers. I assume that this one also had a bamboo framed cursor but it failed to survive the war.

Alco

P266 Alco Personal Calculator	Alco Personal Calculator Made in Japan - Aluminum Addiator and Slide Rule Front Scale Mechanical Addiator (+ / -) Back: A [ B, CI, C ] D
ISRM ALCO 305 Basic Mannheim ISRM ALCO 305 Basic Mannheim in Retail Package	ALCO 305 Basic Mannheim - (c)1970 Made in Japan for Al Nyman & Son Inc. New York Front Scale A [ B, CI, C ] D, K Back Slider: [ S, L, T ] Donated by David Hecht, Alexandria, VA
ISRM ALCO 578 Basic Mannheim in Retail Package	ALCO 578 Basic Mannheim - (c)1970 Made in Japan for Al Nyman & Son Inc. New York Front Scale A [ B, CI, C ] D, K Back Slider: [ S, L, T ] Owned by Ruth Moira (Kilby) Kane (1921-2007). Donated in her memory by her daughter Anne Kilby, Kingston, Washington Ruth was a physicst for Livermore Labs, and her daughter, Ann, remembered that she said "I just wanted to see what a $1.00 slide rule looked like.". See other slide rules from this talented family in the Circular, K&E, Post and Pickett Galleries.

Bristol Line

Bristol Line P18-4 (1963) ISRM 12.06.24.34	Bristol Line P18-4 - Simplex Made in Japan Front Scale 4in // A [ B, CI, C ] D, K Back slider: [S, ST, T ] Donated by Anonymous collector and daughter Stephanie, Phoenix, Arizona
Bristol Line P19-5 ISRM 12.06.24.33	Bristol Line P19-5 - Simplex Made in Japan Front Scale 5in // K, A [ B, CI, C ] D, L Back slider: [S, ST, T ] Donated by Anonymous collector and daughter Stephanie, Phoenix, Arizona

Delta - Ozi Seisakusho

P236 Delta - Ozi SeisaKusho

Delta - Ozi SeisaKusho Made in Japan - Aluminum with stainless rod as used to retain slide Front Scale DF [ CF, CI, C ] D Back: Blank

S246 Fuji F-100	Fuji F-100 Made in Japan - 7 scales Front Scale DF [ CF, CIF, CI, C ] D, A Back: Blank Original Owner: NIB/Netherlands
S192 Fuji 129 Student Log	Fuji 129 Student Log Made in Japan - 14 scales Front Scale L, K, A [ B, CI, C ] D, S, ST, T Back Scale 25cm [ S, LL-1, LL-2, LL-3 ] 10inch
S253 Fuji 129-01 Student Log	Fuji 129-01 Student Log Made in Japan - Note: The bridges were put on the opposite side Front Scale L, K, A [ B, CI, C ] D, S, ST, T Back Scale 25cm [ S, LL-1, LL-2, LL-3 ] 10inch Original Owner: NIB/Netherlands
Fuji QuateLog No201P Log/Log ISRM 13.02.13.04	Fuji QuateLog No201P Log/Log Made in Japan - 20 scales Front Scale 25cm // LL1, LL2, LL3, A DF [ B, BI, CI, C ] D, P, K, LL0 Back Slide: T2 Cot2, T Cot, L, S Cos Back: blank Note: This specimen is in its original retail box and plastic sleeve. No instructions. This slide rule and others in the ISRM archives were donated through the generosity of Phillip Rodley of New Zealand
P156 Fuji 505 Rietz	Fuji 505 Rietz Made in Japan - 7 scales Front Scale 13cm // K, A [ B, CI, C ] D, L Back Slider [ S, ST, T ]
P157 Fuji 535s	Fuji 535s Made in Japan - 8 scales Front Scale 13cm // A [ B, CI, C ] D, K \\ 5in Back Slider [ S, L, T ]
P052 Fuji 552P Duplex Log/Log	Fuji 552P Duplex Log/Log Made in Japan - 23 scales Front Scale LL-0, K, A [ B, T, S, C ] D, P, L, LL0 Back Scale LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1
REF Fuji 553P Duplex Log/Log	Fuji 553P Duplex Log/Log Made in Japan - 23 scales Front Scale T1, T2, DF [ CF, CIF, CI, C ] D, P, S Cos, ST Tan Back Scale LL-1, LL-2, LL-3, A [ B, L, K, C ] D, LL3, LL2, LL1 Multiple Hairlines Archive - Scan provided by Koen Schram, Netherlands
Fuji 1200 Duplex Log/Log ISRM 12.06.24.30	Fuji 1200 Duplex Log/Log Made in Japan - 17 scales Front Scale L, DF [ CF, CIF, CI, C ] D, K Back Scale (extended) RLL, LL, A [ B, S(5.5°-90°), T(5.5°-45°), K, C ] D, DI Multiple Hairlines Note: slide rule body has a light green tint to it Donated by Anonymous collector and daughter. The collector, who prefers to remain anonymous, obtained a B.S. degree in Physics from Taiwan's National Tsing Hua University in 1971. His love for computation has encouraged him to build a collection of slide rules, HP and TI calculators, as well as abaci, many displayed at ISRM.

Hope

Hope No52-G Mannhiem ISRM 13.02.13.02	Hope No52-G Mannhiem Made in Japan - 9 scales Front Scale S, K, A [ B, CI, C ] D, L, T Back: Original Owner name, Ian G. Angus, on stock and slide Note: This specimen is in its plastic sleeve. No instructions. Donated to ISRM by Phillip Rodley, New Zealand
S216 Hope 65-G	Hope 65-G - Closed simplex Made in Japan by Hope Slide Rule Mfg. Co., Ltd. Front Scale LL3, LL2, LL1, A [ B, BI, CI, C ] D, DI, K, LL0 Back Slider [ T1, T2, L, S ] Back: blank
REF Hope 530	Hope 530 - Duplex Made in Japan by Hope Slide Rule Mfg. Co., Ltd. Front Scale LL01, LL02, LL03 , A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale T Cot, ST arc, DF [ CF, CIF, CI, C ] D, P, S Cos Archive - Kimura Satoru Collection, Japan
P147 Hope - Modine Pocket	Hope - Modine Pocket Made in Japan, by Hope Slide Rule Mfg. Co., Ltd. Front Scale 13cm // A, [ B, CI, C ] D, K \\ 5in Back Slider: [ S, L, T ] Back adv: Modine

Intra

REF Intra 1081

Intra 1081 Made in Japan for British Company Intra, presumed to be made by Uchida Yoko, Co Front Scale T2, T1, A [ B, BI, CI, C ] D, P, S Cos, ST Back Scale LL1, LL2, LL3 DF [ CF, CIF, CI, C ] D, L, K Cursor: Multiple Hairlines Scan contributed by Rod Lovette Collection, UK

ISRM Jakar 22 Pocket Darmstadt with Insert Retail Box	Jakar 22 Pocket Darmstadt with Insert Made in Japan by Fuji for British Market Front Scale 13cm // LL2, LL3, A [ B, CI, C ] D, K, LL1 Back Slide: [ P, T, L, S ] With black leather wallet in Retail box. Donated by Richard Davis, Las Vegas, Nevada Manual 7.01Mb Includes models 11 & 55 Rietz, 22 & 77 Darmstadt, 29 Student Log/Log,33 & 99 Duplex Log/Log, 66 Electro, and 88 College Duplex.
S282 Jakar 29 Student Log/Log	Jakar 29 Student Log/Log Made in Japan by Fuji for British Market Front Scale: L, K, A [ B, CI, C ] D, S, ST, T Back Scale: 25cm [ S, LL2, LL3 ] 10in Original Owner/Location: Unk/England
ISRM Jakar 29 Student Log/Log	Jakar 29 Student Log/Log Made in Japan by Fuji for British Market Front Scale: L, K, A [ B, CI, C ] D, S Cos, ST, T Cot Back Scale: 25cm [ S, LL2, LL3 ] 10in Donated by David Hecht, Alexandria, VA 2.73MB
ISRM Jakar 33 Duplex LogLog Pocket Retail Box	Jakar 33 Duplex LogLog Pocket Made in Japan by Fuji for British Market Front Scale: LL-0, K, A [ B, T Cot, S Cos, C ] D, P, L, LL0 Back Scale: LL-1, LL-2, LL-3, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 With black leather wallet in Retail box. Donated by Richard Davis, Las Vegas, Nevada Manual 7.01Mb Includes models 11 & 55 Rietz, 22 & 77 Darmstadt, 29 Student Log/Log,33 & 99 Duplex Log/Log, 66 Electro, and 88 College Duplex.
S348 Jakar 66 Electro	Jakar 66 Electro Made in Japan by Fuji for British Market Front Scale 10in // K, E (Volt/Dynamo/Motor Efficiency), A(kw) [ B(PS), CI, C ] D, LL3, LL2, L Back Scale: [ S cos, ST, T  cot ] Cursor: Multiple Hairlines Original Owner/Location: Unk/England Manual 8.48Mb Includes Jakar Model Nos 11 and 55 Rietz, 22 and 77 Dramstadt and 66 Electro.
ISRM Jakar 523A Pocket Retail Box	Jakar 523A Pocket Made in Japan by Fuji for British Market - c1970 Front Scale 13cm // A [ B, CI, C ] D, K, 5in Back Scale:[ S, L, T ] Original Owner/Location: NIB/England With green plastic wallet in Retail box. Donated by Richard Davis, Las Vegas, Nevada

Kutsuwa

P127 Kutsuwa FN-401	Kutsuwa FN-401 Made in Japan - Retail Package Front Scale A, [ B, CI, C ] D, K Back Slider: [ S, L, T ]

Mead

ISRM Mead Official Pocket Rule	Mead Official Pocket Rule Made in Japan. Distributed by Westab, Dayton, Ohio a division of Mead Corp. Front Scale A [ B, CI, C ] D, K Back: Blank Donated by David Hecht, Alexandria, VA
ISRM Mead 98-1114 Official 10 inch Rule	Mead 98-1114 Official 10 inch Rule Made in Japan for Mead Corp. Dayton, Ohio Front Scale A [ B, CI, C ] D, K Back Slider: [ S, L, T ] Donated by David Hecht, Alexandria, VA

Royal

Royal 1091 Log Log ISRM 13.02.13.03	Royal 1091 Made in Japan probably by Uchida Yoko, Co Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale T2, T1, ST, DF [ CF, CIF, CI, C ] D, P, S Cos Note: In plastic sleeve, no instructions This slide rule and others in the ISRM archives were donated through the generosity of Phillip Rodley of New Zealand
REF Royal 1091 Executive	Royal 1091 Executive Made in Japan probably by Uchida Yoko, Co Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale T2, T1, ST, DF [ CF, CIF, CI, C ] D, P, S Cos Scan contributed by Rod Lovette Collection, UK
REF Royal 5091 Universita	Royal 5091 Universita Made in Japan probably by Uchida Yoko, Co Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale T2, T1, ST, DF [ CF, CIF, CI, C ] D, P, S Cos Scan contributed by Rod Lovette Collection, UK
Royal Executive No. 5091 ISRM 2012.09.26.01	Royal Executive No. 5091 Made in Japan probably by Uchida Yoko, Co Front Scale (extended) LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 Back Scale (extended) T2 Cot, T1 Cot, L, A [ B, K, CI, C ] D, ST, S CosP Donated to ISRM By Ville Koskinen, UK Ville says that this slide rule's history is rather ambiguous. "My father was about to throw it away some years ago, and I salvaged it instead. It may have been bought in early 1970s in Finland and used in college -- or it may have belonged to a relative and then given to my father."

UCHIDA YOKO CO., LTD

S104 Mannheim	Mannheim Made in Japan by Uchida Yoko Co. c1970 Front Scale S, K, A [ B, CI, C ] D, L, T Back: Blank

Unknown Japanese Manufacturer

ISRM Model 883 (Unknown Manufacturer)	Model 883 (Unknown Manufacturer) Made in Japan Front Scale K, DF [ CF, CI, C ] D, A Back Scale Equivalents[ S, L, T ] D, A Donated by David Hecht, Alexandria, VA
Japanese Pocket Mannhiem (C.J. Edwards Promotional)	Pocket Mannhiem (C.J. Edwards Promotional) Made in Japan Front Scale A [ B, CI, C ] D, K Back Scale (flip slide over) [ S, L, T ] Note: Grey plastic sleeve Back advertising: The C.J. Edwards Co. Cleveland, Ohio Donated By Anonymous Collector and daughter
Japanese Pocket Mannhiem (ITT Defense Promotional)	Pocket Mannhiem (ITT Defense Promotional) Made in Japan Front Scale 13cm // A [ B, CI, C ] D, K \\ 5inch Back Scale (flip slide over) [ S, L, T ] Note: Grey plastic sleeve Back advertising: ITT Defense Communications Div. Nutley, New Jersey Donated By Anonymous Collector and daughter
ISRM Japanese Pocket Mannhiem (Unknown Manufacturer)	Japanese Pocket Mannhiem (Unknown Manufacturer) Made in Japan Front Scale 13cm // A [ B, CI, C ] D, K \\ 5in Back Scale (flip slide over) [ S, L, T ] Note: Grey plastic sleeve Donated by David Hecht, Alexandria, VA
ISRM Model Pocket Mannhiem (Unknown Manufacturer)	Pocket Mannhiem (Unknown Manufacturer) Made in Japan - Promotional slide rule for Fawick Airflex Clutches and Brakes Front Scale A [ B, CI, C ] D, K Back Scale [ S, L, T ] Donated by David Hecht, Alexandria, VA