ただの失業したインターネット屋は果たして独立開業できたのか? / Did the fired internet engineer finally start up his business successfully as an independent consultant?

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ͨͩͷࣦۀͨ͠Πϯ λʔωοτ԰͸Ռͨ͠ ͯಠཱ։ۀͰ͖ͨͷ ͔? Kenji Rikitake / ceajp 4-AUG-2018 1

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ྗ෢ ݈࣍ ʢΓ͖͚ͨ ͚Μ͡ʣ ٕज़࢜ʢ৘ใ޻ֶ෦໳ʣ @jj1bdx https://rikitake.jp/ ೔ຊٕज़࢜ձొ࿥ ৽ن։ۀٕज़࢜ࢧԉݚڀձ 4-AUG-2018 Kita-ku, Tokyo, Japan Kenji Rikitake / ceajp 4-AUG-2018 2

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ࣗݾ঺հ —ٕज़࢜ొ࿥: 2001೥ —࢈׭ֶશ෦ܦݧͣΈ —2014೥4݄ʹ։ۀ —1965೥ੜ·Ε —ఆ೥͸͋Γ·ͤΜ —ࢮ͵·Ͱಇ͚ͩ͘ Kenji Rikitake / ceajp 4-AUG-2018 3

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ܦྺ Working on: Erlang, Elixir, C, FreeBSD, TCP/IP, PHP, mruby, C++, C#, Visual Studio, Moodle, macOS, Windows, Vim, Emacs, Arduino, AVR, radio, music, distributed systems, fault tolerance, random numbers, whatever. 28 years in Computer Science, 13 years since PhD, 42 years of ham radio op as @jj1bdx, 2010-2012: Professor, ACCMS/IIMC, Kyoto University, whatever. …աڈͷܦྺ͸ແҙຯ Kenji Rikitake / ceajp 4-AUG-2018 4

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͜ͷ4೥ڧͰԿΛ΍͖͔ͬͯͨ —৘ใηΩϡϦςΟڭՊॻͷ೔ˠӳ຋༁ —↑ͷ࣮αʔϏεͷ೔㱻ӳ຋༁ࢧԉ —C#/C++ઃܭॻ຋༁ͱڭҭγεςϜ࡞Γ —↑ͷϓϩδΣΫτͰຊ֨తͳϦϞʔτ։ൃ —GMOϖύϘ༷ͷݚڀ։ൃίϯαϧλϯτ —৘ใॲཧ҆શ֬อࢧԉ࢜ۀ຿։࢝४උத Kenji Rikitake / ceajp 4-AUG-2018 5

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େࣄͳ͜ͱ ͓ۚ!! ݈߁Ͱͳ͍ͱࢮʹ·͢ Ո଒͕ෆ޾ͩͱۤ࿑͠·͢ Kenji Rikitake / ceajp 4-AUG-2018 6

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΋͏Ұ౓େࣄͳ͜ͱ ͓͕ۚͳ͍ͱԿ΋Ͱ͖·ͤΜ ࠷௿ऩೖ͕ͳ͍ͱੜ׆่յ͠·͢ आۚͨ͠ΒਓੜऴྃͰ͢ ݈߁͸͓͕ۚͳ͍ͱҡ࣋Ͱ͖·ͤΜ Ώͬ͘Γ͢Δͷ͸͠ΜͰ͔Β Kenji Rikitake / ceajp 4-AUG-2018 7

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ࣦഊͱڭ܇ ੒ޭͨ͠࿩Λॻ͍ͯ΋ͨͿ ΜԿ΋͓΋͠Ζ͘ͳ͍ͱࢥ ͏ͷͰࣦഊͷࣄྫΛத৺ʹ ࿩͠·͢ લճ2014೥10݄ͷൃදͱ ಺༰͕ॏͳ͍ͬͯΔ෦෼͕ ͋Γ·͕͢͝༰͍ࣻͩ͘͞ Kenji Rikitake / ceajp 4-AUG-2018 8

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ԿͷͨΊʹ։ۀ͔ͨ͠ ΠϠͳ͜ͱΛ΍Βͳ͍ ૊৫ʹࡴ͞Εͳ͍ มͳϧʔϧʹറΒΕͳ͍ ௨ۈʹࡴ͞Εͳ͍ ೔ຊͷࣾձৗࣝʹࡴ͞Εͳ͍ Kenji Rikitake / ceajp 4-AUG-2018 9

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௨ۈ͸ਓੜͷେఢ —ຖ೔ԟ෮Ͱ4͕ࣦ࣌ؒΘΕͨ —1990~1992: ࡩ্ਫ㱻ఱԦொ —࿈೔ͷ࢒ۀͱਂ໷ۈ຿ —2010~2012: ࣲݪ㱻ग़ொ༄ —ࣗ୐ۈ຿+ΦϑΟεۈ຿ɼۓٸରԠ —ͲͪΒ΋࠷ޙ͸පؾʹͳͬͯऴྃ Kenji Rikitake / ceajp 4-AUG-2018 10

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௨ۈ͠ͳ͍ͷ͕ϕετ ௨ۈ͸ਓੜͷແବ ௨ۈ͠ͳ͍ͷ͕࠷༏ઌ ٬ઌৗறઈରڋ൱ ଧͪ߹Θͤ΋ςϨΧϯ Kenji Rikitake / ceajp 4-AUG-2018 11

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ۈ຿࣌ؒΛ؅ཧ͞ΕͨΒਓੜͷऴΘΓ —ϦϞʔτͳͷʹ9࣌ʙ18࣌ۈ຿߆ଋ —໌ࣔ͞Ε͍ͯͳ͍ϧʔϧͰѹྗΛ͔͚Δ —ΞδϟΠϧ։ൃͷόʔϯμ΢ϯνϟʔτ —͔͔ͬͨ࣌ؒͷه࿥Λ͢Δ͸ͣͳͷʹ —࡞ۀʹ͔͚ͨ࣌ؒΛه࿥͍ͯ͠Δ͚ͩ —੒Ռͱؔ܎ͳ࣌ؒ͘Λ͔͚ͨਓ͕ධՁ͞Ε͍ͯͨ ޮ཰Α͘୹͘΍Δਓ͸ධՁ͞Εͳ͍ Kenji Rikitake / ceajp 4-AUG-2018 12

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όʔϯμ΢ϯνϟʔτͷྫ Kenji Rikitake / ceajp 4-AUG-2018 13

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ϫʔΫϥΠϑόϥϯε͸ଘࡏ͠ͳ͍ ΦϑΟεͷਓੜ .vs. ࣗ୐ͷਓੜ ຖ೔ఆ࣌ۈ຿ .vs. ࡞ۀͱೲظ ࣗ୐ʹډ৔ॴ͕ͳ͍ͱ͍͏ίετ όϥϯε͕औΕΔͷ͸පؾʹͳͬͨͱ͖ ໢ບണ཭(1982) / ݁ࠗͱసۈ(1992) / Ξτϐʔ(2002) / ͏ͭ(2012) ࣗ෼ͷ࣌ؒ͸ࣗ෼Ͱࢮक Kenji Rikitake / ceajp 4-AUG-2018 14

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ಇ͘ؾͷ͠ͳ͍৬৔͸ආ͚Δ δϣϒσΟεΫϦϓγϣϯ͕ෆ໌֬ ۈ຿͕࣌ؒͻͨ͢Β௕͍ ۈ຿࣌ؒҎ֎ͷۀ຿Λڧ੍͢Δ ϓϩύʔҎ֎Λೋڃࢢຽѻ͍ ೥ྸɺੑผɺਓछͳͲʹΑΔࠩผ …೔ຊͷେ෦෼ͷ৬৔͕͋ͯ͸·Δ Kenji Rikitake / ceajp 4-AUG-2018 15

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ෆ৚ཧ΁ͷରԠ ʹ͛Δ ࣙΊΔ Ͳ͏ͯ͠΋ඞཁͰ͋Ε͹ʮ͔ͨͨ͏ʯ Kenji Rikitake / ceajp 4-AUG-2018 16

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ಠཱࣗӦͷࣗ༝ͱ͸ —ސ٬͸ʮ͓٬༷ʯͰ͋ͬͯࣗ෼͕ސ٬ʹറΒ ΕΔඞཁ͸ͳ͍ɺͱ͍͏ݪଇΛࢮक —ސ٬͸ʮಘΒΕΔՁ஋ʹରͯ͠ࢧ෷ֹ͍͕ۚ ͍҆ʯ͔Βൃ஫ͯ͘͠ΕΔͷͰ͋ͬͯɺͦͷ ʮ҆͞ʯΛࣺͯΔΑ͏ͳ͜ͱΛͯ͠͸ͳΒͳ ͍ —ࢧ෷͍͕ଟͯ͘΋͍҆ͱࢥͬͯ΋Β͑ΔΑ͏ʹ ࠷େݶͷ౒ྗΛਚ͘͢ Kenji Rikitake / ceajp 4-AUG-2018 17

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आۚҎ֎ͷެతॿ੒͸શ෦࢖͏ —ޏ༻อݥ͸໎Θͣ΋Β͏ —࠶ब৬ख౰͕ग़Δ͏ͪʹ։ۀ —தখػߏͷখن໛اۀڞࡁ —बۀ࣌ࡂ֐ͷิঈʢ͋Μ͠ΜࡒஂͳͲʣ —ݸਓܕ֬ఆڌग़೥ۚiDeCoʢ60ࡀ·Ͱʣ —ॴಘ͕গͳ͍ͷ͸ஏͰ͸͋Γ·ͤΜ Kenji Rikitake / ceajp 4-AUG-2018 18

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ઌߦ౤ࢿ͸ॏཁ —ऴ਎ձһ (ACM, ARRL) —࢓ࣄ͸શ෦ՈͰͰ͖ΔΑ͏ʹ͢Δ —ITͷ࢓ࣄ͸PCͱࢀߟॻ͕͋Ε͹OK —ए࣌ؒ͘ͷ͋Δ࣌ʹࢿ֨ΛऔΔ —ٕज़࢜ɼҰΞϚɼҰ཮ٕ —৘ใॲཧٕज़ऀ NW, SCʢ৘֬࢜ʣ Kenji Rikitake / ceajp 4-AUG-2018 19

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ࠓޙͷ࢓ࣄͱݟ௨͠ Kenji Rikitake / ceajp 4-AUG-2018 20

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Πϯλʔωοτ԰ͷ࢓ࣄ͸݈શ͔? جຊ͸޿ࠂۀ ޿ࠂͱϚʔέςΟϯάͷϊ΢ϋ΢͸ඞਢ Google, Apple, Facebook, Amazon, Microsoft, Netﬂix ଞͷձࣾ΍৘ใ͸શ෦͓·͚Έ͍ͨͳ΋ͷͩͱ͍͏ޛΓ͕ඞཁ Kenji Rikitake / ceajp 4-AUG-2018 21

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ίϯϐϡʔλ԰ͷ࢓ࣄ͸݈શ͔? Φʔϓϯιʔεͱແঈ࿑ಇԽ ೳྗओٛͱ͸ཪෲͷۀքͷߗ௚Խ ֤छʢಛʹঁੑʣࠩผɼੈ୅ؒஅઈɼਓࡐͷർฐ ඞཁͳ࢓ࣄ = Bullshit Jobs Bullshit Jobsʹ͸Χω͕ճΒͳ͍ ָͳ࢓ࣄ͸ϨουΦʔγϟϯ Kenji Rikitake / ceajp 4-AUG-2018 22

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উػ/঎ػ͸Ͳ͜ʹ͋Δ? ଞਓͷ΍Βͳ͍/Ͱ͖ͳ͍࢓ࣄΛ΍Δ Ͱ͖ͦ͏ʹݟ͑ͳ͍࢓ࣄΛ΍Δ ମྗ͚ͩͰ͸Ͱ͖ͳ͍࢓ࣄΛ΍Δ ؒޱΛແཧͯ͠Ͱ΋޿͛ͯ΍Δ ωοτͰͷചΓࠐΈ͸౰ͨΓલ ୭ʹചΓ͜Ή͔͚ͩ͸Α͘ߟ͑ͯ΍Βͳ͍ͱࣦഊ͢Δ Kenji Rikitake / ceajp 4-AUG-2018 23

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ࣗ෼ͷઐ໳͚ͩͰ͸৯͑ͳ͍ ݹ͍ݴޠͱγεςϜ͕ϝγͷछ ސ٬ͷཁ๬͸ٕज़Ҏ֎ʹ͋Δ ਖ਼࿦͸௨Βͳ͍ ίετ࡟ݮ͋ͬͯͷηΩϡϦςΟ ݎݻͳγεςϜΑΓ΋ૣ͘࡞ΕΔ΋ͷ Kenji Rikitake / ceajp 4-AUG-2018 24

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ͳͥಠཱͨ͠ͷ͔Λৗʹߟ͑Δ Կ͕Ұ൪େ੾͔? ࣌ؒ>͓ۚ>݈߁>Ո଒>>>ͦͷଞ ҰਓͰ࢓ࣄ͢Δ΄͏͕੒Ռ͕ग़ͤΔ ෇͖߹͍͸੾ͬͯࢭΊΔ ి࿩ɺҿΈձɺձٞ͸੒Ռͷఢ Kenji Rikitake / ceajp 4-AUG-2018 25

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͓ΘΓʹ: େࣄͳ͜ͱ ҰਓͰ৯΂͍͚ͯΔ Α͏ʹͳΔ͜ͱ͕ ੜ͖Δ্ͰҰ൪େࣄ ͦͷͨΊʹಠཱࣗӦͱ͍͏ϦεΫΛऔ͖ͬͯͨͷ͔ͩΒ Kenji Rikitake / ceajp 4-AUG-2018 26

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ਤදΫϨδοτ —ྗ෢݈࣍ࣸਅ: ྗ෢ ݈࣍ —όʔϯμ΢ϯνϟʔτ: https:// commons.wikimedia.org/wiki/ File:SampleBurndownChart.png, public domain —ͦͷଞͷࣸਅͷΫϨδοτ͸Πϝʔδத ʹه͍ͯ͠·͢ Kenji Rikitake / ceajp 4-AUG-2018 27