Bitcoin Improvement Flow

#MPDLDIBJO5PLZP!NFSDBSJ #JUDPJO*NQSPWFNFOU'MPX dιϑτϑΥʔΫΛ༻͍ͨίϯηϯαεϨΠϠʔͷվળd

4PGUXBSF&OHJOFFS!(VOPTZ (SBEVBUFEGSPN4QSJOH 8FC"QQMJDBUJPO3BJMT %BQQT4PMJEJUZ 3FTFBSDI$SZQUP$VSSFODZCMPDLDIBJO (JUIVC5XJUUFS!ZBNBSL[ ,B[VLJ:BNBHVDIJ!ZBNBSL[

(VOPTZ#MPDLDIBJO#MPH΍ͬͯ·͢ʂ ʮIUUQCMPDLDIBJOHVOPTZJPʯPSʮάϊγʔϒϩοΫνΣʔϯʯ

"HFOEB wϏοτίΠϯͷվળ wϑΥʔΫͷ෮श wιϑτϑΥʔΫΛ࣮ࢪ͢Δͭͷखஈ w'MBH%BZ"DUJWBUJPO w*T4VQFS.BKPSJUZ wWFSTJPOCJUT w·ͱΊ

ϏοτίΠϯͷվળ

ϏοτίΠϯͷվળ·ͱΊ ೥݄ʹϦϦʔε͞Ε͔ͯΒଟ͘ͷվળ͕͞Ε͖ͯͨɻ w TFHXJU w $PNQBDU#MPDL3FMBZ w )%XBMMFU w $IFDL4FRVFODF7FSJGZ
w $IFDL-PDL5JNF7FSJGZ w .JOJOHUSBOTBDUJPOTFMFDUJPO w 4JHOBUVSFWBMJEBUJPOMJCTFDQL w %JSFDUIFBEFSTBOOPVODFNFOU w 4USJDU%&3TJHOBUVSFT w )FJHIUJO$PJOCBTF w .VMUJ8BMMFU4VQQPSU w 6590NFNPSZBDDPVOUJOH w 5SBOTBDUJPOqPPEJOH w #MPDLpMFQSVOJOH w #JHFOEJBOTVQQPSU w .FNPSZVTBHFPQUJNJ[BUJPO w #MPPN'JMUFS w 01@3&563/ w #JUDPJODMJ w $POTFOTVTMJCSBSZ w 5FTUGPS-PX4TJHOBUVSFTCFGPSF w 3FEVDFVQMPBEUSB⒏D w .FNPSZQPPMMJNJUJOH w 0QUJO3FQMBDFCZGFFUSBOTBDUJPOT w 3FMBZBOE.JOJOH1SJPSJUZUSBOTBDUJPOT w WFSTJPOCJUT w TPGUGPSLUPFOGPSDFTFRVFODFMPDLT GPSSFMBUJWFMPDLUJNF w HFUJOGP%FQSFDBUFE w $PNQBDU#MPDLWFSTJPO w 3FNPWBMPG$PJO"HF1SJPSJUZ w %VQMJDBUFUSBOTBDUJPOT

ϏοτίΠϯͷվળ·ͱΊ ೥݄ʹϦϦʔε͞Ε͔ͯΒ͜Ε·Ͱଟ͘ͷվળ͕͞Ε͖ͯͨɻ w TFHXJU w $PNQBDU#MPDL3FMBZ w )%XBMMFU w $IFDL4FRVFODF7FSJGZ
w $IFDL-PDL5JNF7FSJGZ w .JOJOHUSBOTBDUJPOTFMFDUJPO w 4JHOBUVSFWBMJEBUJPOMJCTFDQL w %JSFDUIFBEFSTBOOPVODFNFOU w 4USJDU%&3TJHOBUVSFT w )FJHIUJO$PJOCBTF w .VMUJ8BMMFU4VQQPSU w 6590NFNPSZBDDPVOUJOH w 5SBOTBDUJPOqPPEJOH w #MPDLpMFQSVOJOH w #JHFOEJBOTVQQPSU w .FNPSZVTBHFPQUJNJ[BUJPO w #MPPN'JMUFS w 01@3&563/ w #JUDPJODMJ w $POTFOTVTMJCSBSZ w 5FTUGPS-PX4TJHOBUVSFTCFGPSF w 3FEVDFVQMPBEUSB⒏D w .FNPSZQPPMMJNJUJOH w 0QUJO3FQMBDFCZGFFUSBOTBDUJPOT w 3FMBZBOE.JOJOH1SJPSJUZUSBOTBDUJPOT w WFSTJPOCJUT w TPGUGPSLUPFOGPSDFTFRVFODFMPDLT GPSSFMBUJWFMPDLUJNF w HFUJOGP%FQSFDBUFE w $PNQBDU#MPDLWFSTJPO w 3FNPWBMPG$PJO"HF1SJPSJUZ w %VQMJDBUFUSBOTBDUJPOT ॳظϦϦʔε͔Β͜Ε·Ͱ  վળ͞Εͨ಺༰͸Ҏ্

ϏοτίΠϯͷվળ·ͱΊ ೥݄ʹϦϦʔε͞Ε͔ͯΒ͜Ε·Ͱଟ͘ͷվળ͕͞Ε͖ͯͨɻ w TFHXJU w $PNQBDU#MPDL3FMBZ w )%XBMMFU w $IFDL4FRVFODF7FSJGZ
w $IFDL-PDL5JNF7FSJGZ w .JOJOHUSBOTBDUJPOTFMFDUJPO w 4JHOBUVSFWBMJEBUJPOMJCTFDQL w %JSFDUIFBEFSTBOOPVODFNFOU w 4USJDU%&3TJHOBUVSFT w )FJHIUJO$PJOCBTF w .VMUJ8BMMFU4VQQPSU w 6590NFNPSZBDDPVOUJOH w 5SBOTBDUJPOqPPEJOH w #MPDLpMFQSVOJOH w #JHFOEJBOTVQQPSU w .FNPSZVTBHFPQUJNJ[BUJPO w #MPPN'JMUFS w 01@3&563/ w #JUDPJODMJ w $POTFOTVTMJCSBSZ w 5FTUGPS-PX4TJHOBUVSFTCFGPSF w 3FEVDFVQMPBEUSB⒏D w .FNPSZQPPMMJNJUJOH w 0QUJO3FQMBDFCZGFFUSBOTBDUJPOT w 3FMBZBOE.JOJOH1SJPSJUZUSBOTBDUJPOT w WFSTJPOCJUT w TPGUGPSLUPFOGPSDFTFRVFODFMPDLT GPSSFMBUJWFMPDLUJNF w HFUJOGP%FQSFDBUFE w $PNQBDU#MPDLWFSTJPO w 3FNPWBMPG$PJO"HF1SJPSJUZ w %VQMJDBUFUSBOTBDUJPOT ࠓճ͸͜ͷվળ಺༰ͷத͔Βɺ ίϯηϯαεϨΠϠʔͷվળʹ஫໨͠ɺ ιϑτϑΥʔΫΛߦ͏ϑϩʔΛ঺հ͠·͢

'PSL ϑΥʔΫ͸େ͖͘෼͚ͯͭɺιϑτϑΥʔΫͱϋʔυϑΥʔΫ ιϑτϑΥʔΫ ϒϩοΫνΣʔϯʹޙํޓ׵ੑͷ͋ΔมߋΛՃ͑ͨ࣌ʹൃੜ͢ΔͷνΣʔϯͷ෼ذ ʮޙํޓ׵ੑ͕͋Δʯͱ͸ɺैདྷΑΓ΋ݫ͍͠ن໿Λઃ͚Δ͜ͱ FY TFHXJUͷಋೖ৽͍͠01ίʔυͷಋೖFUD ϋʔυϑΥʔΫ ϒϩοΫνΣʔϯʹޙํޓ׵ੑͷͳ͍มߋՃ͑ͨ࣌ʹൃੜ͢ΔνΣʔϯͷ෼ذ ʮޙํޓ׵ੑ͕ͳ͍ʯͱ͸ɺैདྷΑΓ΋؇͍ن໿Λઃ͚Δ͜ͱ
FY ϒϩοΫαΠζΛ.#ʹมߋ͢ΔFUD ˢࠓճ͸ͬͪ͜ͷ࿩

'PSL ৄࡉͳղઆ͸ࠓճTLJQ͠·͕͢ɺৄ͘͠஌Γ͍ͨํ͸্هࢿྉΛࢀߟ IUUQTTQFBLFSEFDLDPNTPOBUBSEGPSL

ιϑτϑΥʔΫΛ࣮ࢪ͢Δͭͷखஈ ɾ'MBH%BZ"DUJWBUJPO ɾ*T4VQFS.BKPSJUZ ɾWFSTJPOCJUT

'MBHEBZBDUJWBUJPO

'MBHEBZBDUJWBUJPO Ҏޙɺ৽͍͠ϧʔϧ͕ద༻ ظ೔ͱͯ͠ઃ͚ͨ೔࣌ ظ೔·ͰʹΫϥΠΞϯτΛΞοϓσʔτ ɾॳظϏοτίΠϯͰ࠾༻͞Ε͍ͯͨํ๏ ɾಛఆͷظ೔Λઃ͚ɺظ೔Ҏ߱ʹ৽͍͠ϧʔϧΛద༻

'MBHEBZBDUJWBUJPO Ҏޙɺ৽͍͠ϧʔϧ͕ద༻ ظ೔ͱͯ͠ઃ͚ͨ೔࣌ ظ೔·ͰʹΫϥΠΞϯτΛΞοϓσʔτ ɾॳظϏοτίΠϯίΞͰ࠾༻͞Ε͍ͯͨํ๏ ɾಛఆͷظ೔Λઃ͚ɺظ೔Ҏ߱ʹ৽͍͠ϧʔϧΛద༻ γϯϓϧ͕ͩɺةݥͳख๏ ͳͥͳΒɺظ೔ద༻͸ϚΠφʔͷϋογϡύϫʔͷόϥϯεΛߟྀ͍ͯ͠ͳ͍͔Βɻ ݁Ռɺ3FPSHBOJ[BUJPO໰୊͕ൃੜ͢ΔϦεΫΛ൐͏

3FPSHBOJ[BUJPO໰୊

3FPSHBOJ[BUJPOͱ͸ SFPSH SFPSH SFPSH 3FPSHBOJ[BUJPO νΣʔϯͷ࠶ฤ੒ ෼ذͨ͠νΣʔϯ͕ͭʹऩଋ͢Δ ϏοτίΠϯʹ͸ʮνΣʔϯ͕෼ذͨ͠৔߹ɺ௕͍ํͷνΣʔϯΛ༗ޮͳ΋ͷͱ͢Δʯͱ͍͏ ϧʔϧ͕͋Δɻ͜ΕʹΑΓνΣʔϯ͕࡟আɺ࠶ฤ੒͕ى͖Δɻ
SFPSHʹΑΓɺϒϩοΫҎ্৳ͼͨνΣʔϯ͕࠶ฤ੒͞ΕΔ͜ͱͰࠞཚͨ͠ঢ়گ͕ ࡞ΒΕΔ

ϑϥάσΠΛ༻͍ͯΞΫςΟϕʔτΛ࣮ࢪͨ͠৔໘Λ૝ఆ چ࢓༷νΣʔϯ"ͱ৽࢓༷νΣʔϯ#͕࡞ΒΕɺϋογϡύϫʔ͕፰߅͍ͯ͠Δঢ়گ 3FPSHBOJ[BUJPOʹΑΓൃੜ͢Δ໰୊ چ࢓༷ ৽࢓༷ ϑϥάσΠ " "
" " # # # ϋογϡύϫʔ͕፰߅͍ͯ͠Δঢ়گΛ૝ఆ ΞοϓσʔτΛ͠๨ΕΔ ϒϩοΫҎ্৳ͼΔ

چ࢓༷νΣʔϯ"ͷϚΠφʔ͕νΣʔϯ#ʹҠಈ νΣʔϯ#ͷϋογϡύϫʔ͕ʹͳΓ৳ͼଓ͚ɺ#͕ϝΠϯνΣʔϯͱͯ͠ೝ ࣝ͞ΕΔ 3FPSHBOJ[BUJPOʹΑΓൃੜ͢Δ໰୊ ৽࢓༷ چ࢓༷ ϑϥάσΠ άϧʔϓ#΁ͷ߹ྲྀ
" " " " # # # # # # "ͷϚΠφʔ͕#ʹҠಈ ΞοϓσʔτΛ๨Ε͍ͯͨ͜ͱʹؾͮ͘

νΣʔϯ#͕ϝΠϯνΣʔϯʹͳΓɺνΣʔϯ"ͰSFPSH͕ൃੜ SFPSHʹΑΓ్த·Ͱ৳ͼ͍ͯͨνΣʔϯ"͸࡟আ͞ΕΔ 3FPSHBOJ[BUJPOʹΑΓൃੜ͢Δ໰୊ ৽࢓༷ چ࢓༷ ϑϥάσΠ νΣʔϯ"͕࡟আ͞ΕɺνΣʔϯ#͕ϝΠϯνΣʔϯʹ SFPSHൃੜ
" " " " # # # # # # "ͷϚΠφʔ͕#ʹҠಈ νΣʔϯࣗମ͕࡟আ

3FPSHBOJ[BUJPOͱࠞཚͨ͠ঢ়گ ྫ͋Δ঎඼ΛϏοτίΠϯࢧ෷͍Ͱߪೖͨ͠৔໘ νΣʔϯ"ͷঝೝࡁΈτϥϯβΫγϣϯΛࢀর͠ࢧ෷͍τϥϯβΫγϣϯΛ࡞੒ɺࢧ෷͍Λ ߦ͏ ͜ͷ࣌ࢧ෷͍ʹ࢖༻ͨ͠τϥϯβΫγϣϯ͸ɺνΣʔϯ#Ͱ͸ະঝೝτϥϯβΫγϣϯͷ· ·ͩͬͨ ళһ͸ࢧ෷͍ૹۚΛ֬ೝ͠ɺ঎඼Λ౉͠·͢ ঎඼Λ౉ͨ͠ޙϚΠφʔͷҠಈ͕ൃੜɺνΣʔϯ"ͷ৳ͼ͕4501 ͦͯ͠νΣʔϯ"Ͱ͸SFPSH͕ൃੜ͠ɺνΣʔϯࣗମ͕࡟আ ళһ͕ड͚औͬͨτϥϯβΫγϣϯͷࢀরݩͰ͋ΔঝೝࡁΈτϥϯβΫγϣϯ͕SFPSHʹΑ
Γফ͑ͨͨΊड͚औͬͨτϥϯβΫγϣϯ͕ফࣦɻɻɻ ݁Ռɺൢചଆͷड͚औͬͨରՁ͕ফࣦͨͨ͠ΊɺແྉͰ঎඼Λख౉ͨ͜͠ͱʹɻɻɻ

ࠞཚͨ͠ঢ়گ ফ͑ΔϚΠχϯάใु ड͚औͬͨ#5$͕ফ͑ͨਓ 3FPSHBOJ[BUJPOͱࠞཚͨ͠ঢ়گ

ࠞཚͨ͠ঢ়گ ফ͑ΔϚΠχϯάใु ड͚औͬͨ#5$͕ফ͑ͨਓ 3FPSHBOJ[BUJPOͱࠞཚͨ͠ঢ়گ 3FPSHBOJ[BUJPO͕ൃੜ͠ɺࠞཚ͢Δঢ়گ͕࡞ΒΕΔՄೳੑ ͜ͷ༷ͳՄೳੑͷ͋ΔιϑτϑΥʔΫ͸΍ΊΔ΂͖ͩɻ

*T4VQFS.BKPSJUZ 'MBHEBZ"DUJWBUJPOͷ໰୊఺Λղܾͨ͠ιϑτϑΥʔΫͷखஈ

*T4VQFS.BKPSJUZ ϚΠφʔ͕ੜ੒͢ΔϒϩοΫͷO7FSTJPOϑΟʔϧυͷ஋Λݩʹ൑அ ࠷৽ϒϩοΫ͔Β௚ۙϒϩοΫதϒϩοΫ શମͷ ʹಛఆͷWFSTJPO ஋ؚ͕·Ε͍ͯΔ͔νΣοΫɻؚ·Ε͍ͯͨ৔߹ʹΞΫςΟϕʔτΛ࣮ࢪ ࠷৽ϒϩοΫ ௚ۙϒϩοΫʹWFSTJPO஋ؚ͕·Ε͍ͯΔ͔νΣοΫ͢Δ ௚ۙϒϩοΫதϒϩοΫ શମͷ
ͷ४උ͕੔ͬͨ࣌఺Ͱద༻

*T4VQFS.BKPSJUZ ࠷৽ϒϩοΫ͔Β௚ۙϒϩοΫͷ಺ϒϩοΫʹWFSTJPO஋͕ ؚ·Ε͍ͯΔ͔νΣοΫɻؚ·Ε͍ͯͨ৔߹ʹΞΫςΟϕʔτΛ࣮ࢪ ࠷৽ϒϩοΫ ௚ۙϒϩοΫʹWFSTJPO஋ؚ͕·Ε͍ͯΔ͔νΣοΫ͢Δ ϒϩοΫ͕ϚΠφʔͷରԠঢ়گΛࣔ͢͜ͱͰɺϋογϡύ ϫʔʹԠͨ͡ΞΫςΟϕʔτʹͳͬͨɻ *4.Ͱ͸ϑϥάσΠͰ૝ఆ͞ΕͨϦεΫ͸׬ᘳʹ๷͛ͨɻ ͔͠͠ɺ͜͜Ͱ΋৽ͨͳ໰୊͕ɻɻɻ

w-JNJU5JNF͕ଘࡏ͠ͳ͍ w ͦͷ݁ՌɺιϑτϑΥʔΫ͕׬ྃ͠ͳ͍ݶΓɺ࣮࣭ແݶʹΞΫςΟϕʔτ଴ͪ ͷ൑ఆ͕ଓ͘ wಉ࣌ฒߦͯ͠ιϑτϑΥʔΫͷ࣮ࢪ͕Ͱ͖ͳ͍ w ͦͷ݁Ռɺલʹ࣮ࢪͨ͠ιϑτϑΥʔΫ͕׬ྃ͠ͳ͍ݶΓɺ࣍ͷιϑτϑΥʔ ΫΛ࣮ࢪ͢Δ͜ͱ͕Ͱ͖ͳ͍ *T4VQFS.BKPSJUZ๊͕͑Δ໰୊

WFSTJPOCJUT *T4VQFS.BKPSJUZͷ໰୊఺Λղܾͨ͠ιϑτϑΥʔΫͷखஈ

WFSTJPOCJUT wWFSTJPOCJUT͸#*1Ͱఆٛ͞Ε͍ͯΔιϑτϑΥʔΫͷखஈ w3FUBSHFU1FSJPEͱݺ͹ΕΔϒϩοΫ͝ͱͷ۠੾ΓͰΧ΢ϯτ Λߦ͏ wϒϩοΫΧ΢ϯτ͸ϒϩοΫϔομʔͷWFSTJPO஋ʹಛఆͷ஋ؚ͕·Ε ͍ͯΔ͔Λ൑அ͠ߦ͏ w೥݄࣌఺Ͱ͸͜ͷํ๏Λ༻͍ͯΞΫςΟϕʔτ͕࣮ࢪ͞Ε͍ͯ Δ

WFSTJPOCJUT ϒϩοΫ ϒϩοΫ ୡ੒͠ϩοΫΠϯ ΞΫςΟϕʔτ ৽͍͠Χ΢ϯτελʔτ ϒϩοΫ
3FUBSHFU1FSJPE ϚΠφʔ͕ੜ੒͢ΔϒϩοΫͷO7FSTJPOϑΟʔϧυʹಛఆͷόʔδϣϯ஋ γάφϧ஋ ؚ͕ ·Ε͍ͯΔ͔Λ൑அ  ϒϩοΫதɺϒϩοΫ શମͷ ʹؚ͕·Ε͍ͯΕ͹ϩοΫΠϯΛߦ͍ɺ࣍ͷ 31ͰΞΫςΟϕʔτΛ࣮ࢪ͢Δ

w-JNJU5JNF͕ଘࡏ͠ͳ͍ w ͦͷ݁ՌɺιϑτϑΥʔΫ͕׬ྃ͠ͳ͍ݶΓɺ࣮࣭ແݶʹΞΫςΟϕʔτ଴ͪ ͷ൑ఆ͕ଓ͘ -JNJU5JNF͕ઃఆ͞ΕιϑτϑΥʔΫॳճ࣮ࢪ͔Β೥ͷ࣮ࢪ༗ޮظݶ͕ઃ ఆ͞Εͨ wಉ࣌ฒߦͯ͠ιϑτϑΥʔΫͷ࣮ࢪ͕Ͱ͖ͳ͍ w ͦͷ݁Ռɺલʹ࣮ࢪͨ͠ιϑτϑΥʔΫ͕׬ྃ͠ͳ͍ݶΓɺ࣍ͷιϑτϑΥʔ ΫΛ࣮ࢪ͢Δ͜ͱ͕Ͱ͖ͳ͍
ιϑτϑΥʔΫͷϢχʔΫ൑ఆʹ࢖༻͢ΔWFSTJPO஋͸ݸઃఆͰ͖Δɻ ͦͷͨΊɺಉ࣌ฒߦͰݸͷιϑτϑΥʔΫΛ࣮ࢪ͢Δ͜ͱ͕Մೳʹͳͬͨ WFSTJPOCJUT͸*4.๊͕͑Δ໰୊Λղܾ͍ͯ͠Δ

·ͱΊ 'MBHEBZ" DUJWBUJPO *T4VQFS. BKPSJUZ 7FSTJPOCJUT wϏοτίΠϯ͸ଟ͘ͷػೳվળ͕Ճ͑ΒΕਐԽ͖͍ͯͯ͠Δ wΞϓϦέʔγϣϯ͕෼ࢄతʹ؅ཧ͞Ε͍ͯΔ͕ނʹΞοϓσʔτ ࡞ۀͷ೉қ౓͕ߴ͍ w໰୊Λ๊͑ͳ͕Β΋ιϑτϑΥʔΫͷखஈ͸ਐԽ͖͍ͯͯ͠Δ
ιϑτϑΥʔΫͷखஈ΋ਐԽ

͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ

Bitcoin Improvement Flow

Bitcoin Improvement Flow

Kazuki YAMAGUCHI

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#MPDLDIBJO5PLZP!NFSDBSJ #JUDPJO*NQSPWFNFOU'MPX dιϑτϑΥʔΫΛ༻͍ͨίϯηϯαεϨΠϠʔͷվળd

4PGUXBSF&OHJOFFS!(VOPTZ (SBEVBUFEGSPN4QSJOH 8FC"QQMJDBUJPO3BJMT %BQQT4PMJEJUZ 3FTFBSDI$SZQUP$VSSFODZCMPDLDIBJO (JUIVC5XJUUFS!ZBNBSL[ ,B[VLJ:BNBHVDIJ!ZBNBSL[

(VOPTZ#MPDLDIBJO#MPH΍ͬͯ·͢ʂ ʮIUUQCMPDLDIBJOHVOPTZJPʯPSʮάϊγʔϒϩοΫνΣʔϯʯ

"HFOEB wϏοτίΠϯͷվળ wϑΥʔΫͷ෮श wιϑτϑΥʔΫΛ࣮ࢪ͢Δͭͷखஈ w'MBH%BZ"DUJWBUJPO w*T4VQFS.BKPSJUZ wWFSTJPOCJUT w·ͱΊ

ϏοτίΠϯͷվળ

ϏοτίΠϯͷվળ·ͱΊ ೥݄ʹϦϦʔε͞Ε͔ͯΒଟ͘ͷվળ͕͞Ε͖ͯͨɻ w TFHXJU w $PNQBDU#MPDL3FMBZ w )%XBMMFU w $IFDL4FRVFODF7FSJGZ

ϏοτίΠϯͷվળ·ͱΊ ೥݄ʹϦϦʔε͞Ε͔ͯΒ͜Ε·Ͱଟ͘ͷվળ͕͞Ε͖ͯͨɻ w TFHXJU w $PNQBDU#MPDL3FMBZ w )%XBMMFU w $IFDL4FRVFODF7FSJGZ

ϏοτίΠϯͷվળ·ͱΊ ೥݄ʹϦϦʔε͞Ε͔ͯΒ͜Ε·Ͱଟ͘ͷվળ͕͞Ε͖ͯͨɻ w TFHXJU w $PNQBDU#MPDL3FMBZ w )%XBMMFU w $IFDL4FRVFODF7FSJGZ

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