I have said many, many times that yose does not mean endgame. It refers to boundary plays, which can happen at any time.
Here is an example where a yose-shoubu, or yose duel, starts as early as White 68. A yose duel, or boundary play duel, is the Japanese term for a strategy in which a player decides to settle the game by starting to wall off territories early.
This record follows two sources; in Takagawa's Collected Games 83 and 95 are transposed.
(;SZ[19]FF[3]
PW[Takagawa Kaku]
WR[7d]
PB[Hashimoto Utaro]
BR[8d]
EV[7th Honinbo Final]
DT[1952]
KM[4.5]
RE[W+3.5]
US[GoGoD95]
;B[qd];W[dd];B[nc];W[pp];B[dq];W[co];B[dl];W[fo];B[gp];W[go];B[fp];W[ho]
;B[eo];W[en];B[dn];W[do];B[ep];W[dm];B[cn];W[cm];B[bn];W[em];B[bo];W[hp]
;B[pj];W[ql];B[or];W[pq];B[lq];W[gc];B[ol];W[pn];B[pl];W[rk];B[qm];W[qi]
;B[pm];W[qf];B[on];W[nq];B[nr];W[mo];B[pr];W[rm];B[po];W[ro];B[qo];W[rp]
;B[pf];W[pg];B[pe];W[og];B[kc];W[ce];B[di];W[fi];B[cg];W[bm];B[eg];W[gg]
;B[ee];W[ed];B[ck];W[ek];B[kp];W[kn];B[lk];W[kk];B[kj];W[jj];B[lj];W[bi]
;B[bf];W[bk];B[bh];W[ci];B[ch];W[df];B[ef];W[bd];B[dg];W[eh];B[gf];W[jc]
;B[jb];W[ib];B[kb];W[fg];B[cc];W[bc];B[de];W[be];B[ic];W[hb];B[ge];W[ji]
;B[kl];W[jk];B[km];W[jn];B[fc];W[fb];B[dj];W[cj];B[dh];W[dk];B[ai];W[cl]
;B[if];W[re];B[rd];W[jg];B[hr];W[hq];B[gr];W[mq];B[mr];W[jq];B[qq];W[qp]
;B[rq];W[mm];B[ml];W[ir];B[sq];W[sd];B[sc];W[se];B[rc];W[nm];B[qj];W[rj]
;B[pi];W[ph];B[ni];W[jf];B[ie];W[ig];B[ke];W[lf];B[jp];W[jm];B[fd];W[ec]
;B[ne];W[rn];B[qn];W[kr];B[lr];W[gq];B[fq];W[bp];B[cp];W[an];B[dp];W[ao]
;B[bq];W[gd];B[fe];W[jd];B[je];W[id];B[hd];W[hc];B[he];W[db];B[ng];W[rg]
;B[qk];W[rl];B[of];W[mh];B[qh];W[ri];B[oh];W[qg];B[mg];W[lg];B[lh];W[li]
;B[kh];W[ki];B[mi];W[ap];B[aq];W[am];B[kd];W[ic];B[aj];W[le];B[ld];W[jh]
;B[nh];W[fr];B[er];W[ip];B[ks];W[js];B[ls];W[kq];B[lo];W[ln];B[nl];W[jl]
;B[ll];W[me];B[md];W[hs];B[fs];W[ja];B[ka];W[ia];B[ei];W[fh];B[hg];W[hh]
;B[ej];W[fj];B[sp];W[af];B[ag];W[ae];B[cf];W[ak];B[so];W[sn];B[jo];W[io]
;B[nn];W[mp];B[lp];W[oq];B[no];W[mf];B[hf]
)